WP_Http_Encoding::decompress( string $compressed, int $length = null ): string|false

Decompression of deflated string.

Description

Will attempt to decompress using the RFC 1950 standard, and if that fails then the RFC 1951 standard deflate will be attempted. Finally, the RFC 1952 standard gzip decode will be attempted. If all fail, then the original compressed string will be returned.

Parameters

$compressedstringrequired
String to decompress.
$lengthintoptional
The optional length of the compressed data.

Default:null

Return

string|false Decompressed string on success, false on failure.

Source

public static function decompress( $compressed, $length = null ) {

	if ( empty( $compressed ) ) {
		return $compressed;
	}

	$decompressed = @gzinflate( $compressed );
	if ( false !== $decompressed ) {
		return $decompressed;
	}

	$decompressed = self::compatible_gzinflate( $compressed );
	if ( false !== $decompressed ) {
		return $decompressed;
	}

	$decompressed = @gzuncompress( $compressed );
	if ( false !== $decompressed ) {
		return $decompressed;
	}

	if ( function_exists( 'gzdecode' ) ) {
		$decompressed = @gzdecode( $compressed );

		if ( false !== $decompressed ) {
			return $decompressed;
		}
	}

	return $compressed;
}

Changelog

VersionDescription
2.8.0Introduced.

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