gzcompress

Function • Params and return types changed in PHP 8.0

Compress a string.

PHP 5
PHP 7
PHP 8.0
Improved
PHP 8.1
PHP 8.2-8.3
PHP 8.4
PHP 8.5
PHP 8.6

gzcompress Function synopsis

gzcompress(
    string $data,
    int $level = -1,
    int $encoding = ZLIB_ENCODING_DEFLATE
  ): string|false

Parameters

$data

Typestring

The data to compress.

$level

OptionalTypeintDefault value-1

The level of compression. Can be given as 0 for no compression up to 9 for maximum compression.

$encoding

OptionalTypeintDefault valueZLIB_ENCODING_DEFLATE

One of ZLIB_ENCODING_* constants.

Return value

Typestring|false

The compressed string or false if an error occurred.

Changes to the gzcompress Function

PHP 8.0

  • Return type added: string|false
  • Parameter type added for parameter #1 ($data): string
  • Parameter type added for parameter #2 ($level): int
  • Parameter default value added for position #2 ($level): -1
  • Parameter type added for parameter #3 ($encoding): int
  • Parameter default value added for position #3 ($encoding): ZLIB_ENCODING_DEFLATE
  gzcompress(
-     $data,
+     string $data,
-     $level,
+     int $level = -1,
-     $encoding
+     int $encoding = ZLIB_ENCODING_DEFLATE
-   )
+   ): string|false

PHP 5.4

  • Optional parameter added - #3: $encoding
-gzcompress($data, $level)
+gzcompress(
+    $data,
+    $level,
+    $encoding
+  )

gzcompress Function Availability

PHP VersionAvailability
PHP 8.6Upcoming Release Yes
PHP 8.5Supported (Latest) Yes
PHP 8.4Supported Yes
PHP 8.3Security-Fixes Only Yes
PHP 8.2Security-Fixes Only Yes
PHP 8.1Unsupported Yes
PHP 8.0Unsupported Yes
PHP 7.4Unsupported Yes
PHP 7.3Unsupported Yes
PHP 7.2Unsupported Yes
PHP 7.1Unsupported Yes
PHP 7.0Unsupported Yes
PHP 5.6Unsupported Yes
PHP 5.5Unsupported Yes
PHP 5.4Unsupported Yes
PHP 5.3Unsupported Yes