Question

verify_file_md5( string $filename,  string $expected_md5 )

Calculates and compares the MD5 of a file to its expected value.

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description

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参数

$filename

(string) (Required) The filename to check the MD5 of.

$expected_md5

(string) (Required) The expected MD5 of the file, either a base64 encoded raw md5, or a hex-encoded md5

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返回值

(bool|object) WP_Error on failure, true on success, false when the MD5 format is unknown/unexpected

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源代码

File: wp-admin/includes/file.php

function verify_file_md5( $filename, $expected_md5 ) {
	if ( 32 == strlen( $expected_md5 ) )
		$expected_raw_md5 = pack( 'H*', $expected_md5 );
	elseif ( 24 == strlen( $expected_md5 ) )
		$expected_raw_md5 = base64_decode( $expected_md5 );
	else
		return false; // unknown format

	$file_md5 = md5_file( $filename, true );

	if ( $file_md5 === $expected_raw_md5 )
		return true;

	return new WP_Error( 'md5_mismatch', sprintf( __( 'The checksum of the file (%1$s) does not match the expected checksum value (%2$s).' ), bin2hex( $file_md5 ), bin2hex( $expected_raw_md5 ) ) );
}

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更新日志

Version	description
3.7.0	Introduced.

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相关函数

Uses

• wp-includes/l10n.php: __()
• wp-includes/class-wp-error.php: WP_Error::__construct()

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Used By

• wp-admin/includes/file.php: download_url()

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User Contributed Notes