Question

win_is_writable( string $path )

Workaround for Windows bug in is_writable() function

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description

PHP has issues with Windows ACL’s for determine if a directory is writable or not, this works around them by checking the ability to open files rather than relying upon PHP to interprate the OS ACL.

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参数

$path

(string) (Required) Windows path to check for write-ability.

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返回值

(bool) Whether the path is writable.

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源代码

File: wp-includes/functions.php

function win_is_writable( $path ) {

	if ( $path[strlen( $path ) - 1] == '/' ) { // if it looks like a directory, check a random file within the directory
		return win_is_writable( $path . uniqid( mt_rand() ) . '.tmp');
	} elseif ( is_dir( $path ) ) { // If it's a directory (and not a file) check a random file within the directory
		return win_is_writable( $path . '/' . uniqid( mt_rand() ) . '.tmp' );
	}
	// check tmp file for read/write capabilities
	$should_delete_tmp_file = !file_exists( $path );
	$f = @fopen( $path, 'a' );
	if ( $f === false )
		return false;
	fclose( $f );
	if ( $should_delete_tmp_file )
		unlink( $path );
	return true;
}

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更新日志

Version	description
2.8.0	Introduced.

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相关函数

Uses

• wp-includes/functions.php: win_is_writable()

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Used By

• wp-admin/includes/misc.php: iis7_save_url_rewrite_rules()
• wp-includes/functions.php: wp_is_writable()
• wp-includes/functions.php: win_is_writable()

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User Contributed Notes