Media: Use `version_compare()` for Imagick version check when removing alpha.

Previously `remove_pdf_alpha_channel()` used `Imagick::getVersion()` to validate the environment is capable of handling alpha. This was the incorrect function to use to check the module version as it will only provide the ImageMagick API version. This patch adjusts to instead use `phpversion()` as this is the correct method to get the Imagick version needed to determine alpha compatibility. This fixes a number of host tests that have been correctly failing on subsets of environments. Serendipidously, sometimes the API version was high enough to avoid shining light on this problem.

Props swissspidy, joedolson, antpb.
Fixes #60798.

Built from https://develop.svn.wordpress.org/trunk@58415


git-svn-id: http://core.svn.wordpress.org/trunk@57864 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-image-editor-imagick.php

@@ -775,9 +775,8 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
 	 * @since 6.4.0
 	 */
 	protected function remove_pdf_alpha_channel() {
-		$version = Imagick::getVersion();
 		// Remove alpha channel if possible to avoid black backgrounds for Ghostscript >= 9.14. RemoveAlphaChannel added in ImageMagick 6.7.5.
-		if ( $version['versionNumber'] >= 0x675 ) {
+		if ( version_compare( phpversion( 'imagick' ), '9.14', '>=' ) ) {
 			try {
 				// Imagick::ALPHACHANNEL_REMOVE mapped to RemoveAlphaChannel in PHP imagick 3.2.0b2.
 				$this->image->setImageAlphaChannel( defined( 'Imagick::ALPHACHANNEL_REMOVE' ) ? Imagick::ALPHACHANNEL_REMOVE : 12 );

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-beta2-58414';
+$wp_version = '6.6-beta2-58415';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.