Bootstrap: Enhance core's memory limit handling.
* Don't lower memory limit if the current limit is greater than `WP_MAX_MEMORY_LIMIT`. * Set `WP_MEMORY_LIMIT` and `WP_MAX_MEMORY_LIMIT` to current limit if the `memory_limit` setting can't be changed at runtime. * Use `wp_convert_hr_to_bytes()` when parsing the value of the `memory_limit` setting because it can be a shorthand or an integer value. * Introduce `wp_raise_memory_limit( $context )` to raise the PHP memory limit for memory intensive processes. This DRYs up some logic and includes the existing `admin_memory_limit` and `image_memory_limit` filters. The function can also be used for custom contexts, the `{$context}_memory_limit` filter allows to customize the limit. * Introduce `wp_is_ini_value_changeable( $setting )` to determine whether a PHP ini value is changeable at runtime. * Remove a `function_exists( 'memory_get_usage' )` check. Since PHP 5.2.1 support for memory limit is always enabled. Related commits: [38011-38013] Props jrf, A5hleyRich, swissspidy, ocean90. Fixes #32075. Built from https://develop.svn.wordpress.org/trunk@38015 git-svn-id: http://core.svn.wordpress.org/trunk@37956 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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@ -138,21 +138,7 @@ else
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require(ABSPATH . 'wp-admin/menu.php');
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if ( current_user_can( 'manage_options' ) ) {
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/**
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* Filters the maximum memory limit available for administration screens.
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*
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* This only applies to administrators, who may require more memory for tasks like updates.
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* Memory limits when processing images (uploaded or edited by users of any role) are
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* handled separately.
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*
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* The WP_MAX_MEMORY_LIMIT constant specifically defines the maximum memory limit available
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* when in the administration back end. The default is 256M, or 256 megabytes of memory.
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*
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* @since 3.0.0
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*
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* @param string 'WP_MAX_MEMORY_LIMIT' The maximum WordPress memory limit. Default 256M.
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*/
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@ini_set( 'memory_limit', apply_filters( 'admin_memory_limit', WP_MAX_MEMORY_LIMIT ) );
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wp_raise_memory_limit( 'admin' );
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}
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/**
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@ -569,9 +569,8 @@ function unzip_file($file, $to) {
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if ( ! $wp_filesystem || !is_object($wp_filesystem) )
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return new WP_Error('fs_unavailable', __('Could not access filesystem.'));
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// Unzip can use a lot of memory, but not this much hopefully
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/** This filter is documented in wp-admin/admin.php */
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@ini_set( 'memory_limit', apply_filters( 'admin_memory_limit', WP_MAX_MEMORY_LIMIT ) );
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// Unzip can use a lot of memory, but not this much hopefully.
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wp_raise_memory_limit( 'admin' );
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$needed_dirs = array();
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$to = trailingslashit($to);
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@ -585,8 +585,7 @@ function image_edit_apply_changes( $image, $changes ) {
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function stream_preview_image( $post_id ) {
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$post = get_post( $post_id );
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/** This filter is documented in wp-admin/admin.php */
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@ini_set( 'memory_limit', apply_filters( 'admin_memory_limit', WP_MAX_MEMORY_LIMIT ) );
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wp_raise_memory_limit( 'admin' );
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$img = wp_get_image_editor( _load_image_to_edit_path( $post_id ) );
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@ -96,18 +96,8 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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if ( ! is_file( $this->file ) && ! preg_match( '|^https?://|', $this->file ) )
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return new WP_Error( 'error_loading_image', __('File doesn’t exist?'), $this->file );
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/**
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* Filters the memory limit allocated for image manipulation.
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*
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* @since 3.5.0
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*
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* @param int|string $limit Maximum memory limit to allocate for images. Default WP_MAX_MEMORY_LIMIT.
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* Accepts an integer (bytes), or a shorthand string notation, such as '256M'.
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*/
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$image_memory_limit = apply_filters( 'image_memory_limit', WP_MAX_MEMORY_LIMIT );
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// Set artificially high because GD uses uncompressed images in memory.
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@ini_set( 'memory_limit', $image_memory_limit );
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wp_raise_memory_limit( 'image' );
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$this->image = @imagecreatefromstring( file_get_contents( $this->file ) );
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@ -137,14 +137,11 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
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if ( ! is_file( $this->file ) && ! preg_match( '|^https?://|', $this->file ) )
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return new WP_Error( 'error_loading_image', __('File doesn’t exist?'), $this->file );
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/** This filter is documented in wp-includes/class-wp-image-editor-gd.php */
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$image_memory_limit = apply_filters( 'image_memory_limit', WP_MAX_MEMORY_LIMIT );
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/*
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* Even though Imagick uses less PHP memory than GD, set higher limit
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* for users that have low PHP.ini limits.
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*/
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@ini_set( 'memory_limit', $image_memory_limit );
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wp_raise_memory_limit( 'image' );
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try {
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$this->image = new Imagick( $this->file );
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@ -28,36 +28,39 @@ function wp_initial_constants() {
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define( 'TB_IN_BYTES', 1024 * GB_IN_BYTES );
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/**#@-*/
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// set memory limits
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if ( !defined('WP_MEMORY_LIMIT') ) {
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if ( is_multisite() ) {
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define('WP_MEMORY_LIMIT', '64M');
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$current_limit = @ini_get( 'memory_limit' );
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$current_limit_int = wp_convert_hr_to_bytes( $current_limit );
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// Define memory limits.
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if ( ! defined( 'WP_MEMORY_LIMIT' ) ) {
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if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) {
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define( 'WP_MEMORY_LIMIT', $current_limit );
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} elseif ( is_multisite() ) {
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define( 'WP_MEMORY_LIMIT', '64M' );
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} else {
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define('WP_MEMORY_LIMIT', '40M');
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define( 'WP_MEMORY_LIMIT', '40M' );
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}
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}
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if ( ! defined( 'WP_MAX_MEMORY_LIMIT' ) ) {
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if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) {
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define( 'WP_MAX_MEMORY_LIMIT', $current_limit );
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} elseif ( -1 === $current_limit_int || $current_limit_int > 268435456 /* = 256M */ ) {
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define( 'WP_MAX_MEMORY_LIMIT', $current_limit );
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} else {
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define( 'WP_MAX_MEMORY_LIMIT', '256M' );
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}
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}
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// Set memory limits.
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$wp_limit_int = wp_convert_hr_to_bytes( WP_MEMORY_LIMIT );
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if ( -1 !== $current_limit_int && ( -1 === $wp_limit_int || $wp_limit_int > $current_limit_int ) ) {
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@ini_set( 'memory_limit', WP_MEMORY_LIMIT );
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}
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if ( ! isset($blog_id) )
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$blog_id = 1;
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// set memory limits.
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if ( function_exists( 'memory_get_usage' ) ) {
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$current_limit = @ini_get( 'memory_limit' );
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$current_limit_int = intval( $current_limit );
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if ( false !== strpos( $current_limit, 'G' ) )
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$current_limit_int *= 1024;
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$wp_limit_int = intval( WP_MEMORY_LIMIT );
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if ( false !== strpos( WP_MEMORY_LIMIT, 'G' ) )
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$wp_limit_int *= 1024;
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if ( -1 != $current_limit && ( -1 == WP_MEMORY_LIMIT || $current_limit_int < $wp_limit_int ) )
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@ini_set( 'memory_limit', WP_MEMORY_LIMIT );
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}
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if ( !defined('WP_CONTENT_DIR') )
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define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' ); // no trailing slash, full paths only - WP_CONTENT_URL is defined further down
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@ -3175,11 +3175,8 @@ function wp_load_image( $file ) {
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if ( ! function_exists('imagecreatefromstring') )
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return __('The GD image library is not installed.');
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/** This filter is documented in wp-includes/class-wp-image-editor-gd.php */
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$image_memory_limit = apply_filters( 'image_memory_limit', WP_MAX_MEMORY_LIMIT );
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// Set artificially high because GD uses uncompressed images in memory.
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@ini_set( 'memory_limit', $image_memory_limit );
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wp_raise_memory_limit( 'image' );
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$image = imagecreatefromstring( file_get_contents( $file ) );
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@ -5379,3 +5379,112 @@ function wp_object_type_exists( $object_type ) {
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return false;
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}
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/**
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* Attempts to raise the PHP memory limit for memory intensive processes.
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*
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* Only allows raising the existing limit and prevents lowering it.
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*
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* @since 4.6.0
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*
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* @param string $context Context in which the function is called.
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* Either 'admin', 'image' or an arbitrary other context.
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* Defaults to 'admin'.
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* If an arbitrary context is passed, the similarly arbitrary
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* "{$context}_memory_limit" filter will be invoked.
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* @return bool|int|string The limit that was set or false on failure.
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*/
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function wp_raise_memory_limit( $context = 'admin' ) {
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// Exit early if the limit cannot be changed.
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if ( false === wp_is_ini_value_changeable( 'memory_limit' ) ) {
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return false;
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}
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$current_limit = @ini_get( 'memory_limit' );
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$current_limit_int = wp_convert_hr_to_bytes( $current_limit );
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if ( -1 === $current_limit_int ) {
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return false;
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}
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$wp_max_limit = WP_MAX_MEMORY_LIMIT;
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$wp_max_limit_int = wp_convert_hr_to_bytes( $wp_max_limit );
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$filtered_limit = $wp_max_limit;
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switch ( $context ) {
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case 'admin':
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/**
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* Filters the maximum memory limit available for administration screens.
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*
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* This only applies to administrators, who may require more memory for tasks like updates.
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* Memory limits when processing images (uploaded or edited by users of any role) are
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* handled separately.
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*
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* The WP_MAX_MEMORY_LIMIT constant specifically defines the maximum memory limit available
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* when in the administration back end. The default is 256M (256 megabytes
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* of memory) or the original `memory_limit` php.ini value if this is higher.
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*
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* @since 3.0.0
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* @since 4.6.0 The default takes the original `memory_limit` into account.
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*
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* @param int|string $filtered_limit The maximum WordPress memory limit.
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* Accepts an integer (bytes), or a shorthand string
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* notation, such as '256M'.
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*/
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$filtered_limit = apply_filters( 'admin_memory_limit', $filtered_limit );
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break;
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case 'image':
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/**
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* Filters the memory limit allocated for image manipulation.
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*
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* @since 3.5.0
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* @since 4.6.0 The default takes the original `memory_limit` into account.
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*
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* @param int|string $filtered_limit Maximum memory limit to allocate for images.
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* Default WP_MAX_MEMORY_LIMIT or the original
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* php.ini memory_limit, whichever is higher.
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* Accepts an integer (bytes), or a shorthand string
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* notation, such as '256M'.
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*/
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$filtered_limit = apply_filters( 'image_memory_limit', $filtered_limit );
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break;
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default:
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/**
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* Filters the memory limit allocated for arbitrary contexts.
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*
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* The dynamic portion of the hook name, `$context`, refers to an arbitrary
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* context passed on calling the function. This allows for plugins to define
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* their own contexts for raising the memory limit.
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*
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* @since 4.6.0
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*
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* @param int|string $filtered_limit Maximum memory limit to allocate for images.
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* Default 256M or the original php.ini memory_limit,
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* whichever is higher.
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* Accepts an integer (bytes), or a shorthand string
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* notation, such as '256M'.
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*/
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$filtered_limit = apply_filters( "{$context}_memory_limit", $filtered_limit );
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break;
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}
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$filtered_limit_int = wp_convert_hr_to_bytes( $filtered_limit );
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if ( -1 === $filtered_limit_int || ( $filtered_limit_int > $wp_max_limit_int && $filtered_limit_int > $current_limit_int ) ) {
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if ( false !== @ini_set( 'memory_limit', $filtered_limit ) ) {
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return $filtered_limit;
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} else {
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return false;
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}
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} elseif ( -1 === $wp_max_limit_int || $wp_max_limit_int > $current_limit_int ) {
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if ( false !== @ini_set( 'memory_limit', $wp_max_limit ) ) {
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return $wp_max_limit;
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} else {
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return false;
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}
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}
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return false;
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}
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@ -1002,3 +1002,27 @@ function wp_convert_hr_to_bytes( $value ) {
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// Deal with large (float) values which run into the maximum integer size.
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return min( $bytes, PHP_INT_MAX );
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}
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/**
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* Determines whether a PHP ini value is changeable at runtime.
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*
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* @since 4.6.0
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*
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* @link http://php.net/manual/en/function.ini-get-all.php
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*
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* @param string $setting The name of the ini setting to check.
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* @return bool True if the value is changeable at runtime. False otherwise.
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*/
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function wp_is_ini_value_changeable( $setting ) {
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static $ini_all;
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if ( ! isset( $ini_all ) ) {
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$ini_all = ini_get_all();
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}
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if ( isset( $ini_all[ $setting ]['access'] ) && ( INI_ALL === $ini_all[ $setting ]['access'] || INI_USER === $ini_all[ $setting ]['access'] ) ) {
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return true;
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}
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return false;
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}
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@ -4,7 +4,7 @@
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*
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* @global string $wp_version
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*/
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$wp_version = '4.6-beta2-38014';
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$wp_version = '4.6-beta2-38015';
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/**
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* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
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