Question

mbstring_binary_safe_encoding( bool $reset = false )

Set the mbstring internal encoding to a binary safe encoding when func_overload is enabled.

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description

When mbstring.func_overload is in use for multi-byte encodings, the results from strlen() and similar functions respect the utf8 characters, causing binary data to return incorrect lengths.

This function overrides the mbstring encoding to a binary-safe encoding, and resets it to the users expected encoding afterwards through the reset_mbstring_encoding function.

It is safe to recursively call this function, however each mbstring_binary_safe_encoding() call must be followed up with an equal number of reset_mbstring_encoding() calls.

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参数

$reset

(bool) (Optional) Whether to reset the encoding back to a previously-set encoding.

Default value: false

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源代码

File: wp-includes/functions.php

function mbstring_binary_safe_encoding( $reset = false ) {
	static $encodings = array();
	static $overloaded = null;

	if ( is_null( $overloaded ) )
		$overloaded = function_exists( 'mb_internal_encoding' ) && ( ini_get( 'mbstring.func_overload' ) & 2 );

	if ( false === $overloaded )
		return;

	if ( ! $reset ) {
		$encoding = mb_internal_encoding();
		array_push( $encodings, $encoding );
		mb_internal_encoding( 'ISO-8859-1' );
	}

	if ( $reset && $encodings ) {
		$encoding = array_pop( $encodings );
		mb_internal_encoding( $encoding );
	}
}

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更新日志

Version	description
3.7.0	Introduced.

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相关函数

Used By

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• wp-admin/includes/image.php: wp_read_image_metadata()
• wp-admin/includes/class-wp-filesystem-ftpsockets.php: WP_Filesystem_ftpsockets::dirlist()
• wp-admin/includes/class-wp-filesystem-ftpsockets.php: WP_Filesystem_ftpsockets::get_contents()
• wp-admin/includes/class-wp-filesystem-ftpsockets.php: WP_Filesystem_ftpsockets::put_contents()
• wp-admin/includes/file.php: _unzip_file_pclzip()
• wp-includes/formatting.php: seems_utf8()
• wp-includes/formatting.php: utf8_uri_encode()
• wp-includes/functions.php: reset_mbstring_encoding()
• wp-includes/class-http.php: WP_Http::request()
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User Contributed Notes