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Database: Hardening to bring `wpdb::prepare()` inline with documentation. 

`wpdb::prepare()` supports %s, %d, and %F as placeholders in the query string. Any other non-escaped % will be escaped.

Merges [41496] to 4.2 branch.


Built from https://develop.svn.wordpress.org/branches/4.2@41503


git-svn-id: http://core.svn.wordpress.org/branches/4.2@41336 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Aaron Campbell 2017-09-19 18:31:29 +00:00
parent 79e0bb13d4
commit a964c2ba2e
1 changed files with 3 additions and 1 deletions
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4
wp-includes/wp-db.php
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@ -1233,6 +1233,7 @@ class wpdb {
$query = str_replace( '"%s"', '%s', $query ); // doublequote unquoting
$query = preg_replace( '|(?<!%)%f|' , '%F', $query ); // Force floats to be locale unaware
$query = preg_replace( '|(?<!%)%s|', "'%s'", $query ); // quote the strings, avoiding escaped strings like %%s
$query = preg_replace( '/%(?:%|$|([^dsF]))/', '%%\\1', $query ); // escape any unescaped percents
array_walk( $args, array( $this, 'escape_by_ref' ) );
return @vsprintf( $query, $args );
}
@ -2696,7 +2697,8 @@ class wpdb {
}
if ( is_array( $value['length'] ) ) {
$queries[ $col ] = $this->prepare( "CONVERT( LEFT( CONVERT( %s USING $charset ), %.0f ) USING {$this->charset} )", $value['value'], $value['length']['length'] );
$length = sprintf( '%.0f', $value['length']['length'] );
$queries[ $col ] = $this->prepare( "CONVERT( LEFT( CONVERT( %s USING $charset ), $length ) USING {$this->charset} )", $value['value'] );
} else if ( 'binary' !== $charset ) {
// If we don't have a length, there's no need to convert binary - it will always return the same result.
$queries[ $col ] = $this->prepare( "CONVERT( CONVERT( %s USING $charset ) USING {$this->charset} )", $value['value'] );