PHP gzclose() Function: Usage and Examples

Use gzclose() when you need to closes a gzip file stream in a PHP application. The examples below show the actual operation and its limitations.

What Is gzclose() in PHP?

Closes a gzip file stream. The exact signature supported by your installation depends on its PHP version and enabled extensions.

Its syntax is:

gzclose($stream): bool

Parameters and return value: The parameter types, optional arguments, references, and return type are shown in the signature above. Optional parameters are marked with an ellipsis in this reference signature.

Example 1: Basic Usage

<?php

$path = tempnam(sys_get_temp_dir(),"gzip_"); $file = gzopen($path,"wb"); gzwrite($file,"test"); var_dump(gzclose($file)); unlink($path);

Output:

bool(true)

Example 2: Different Input or Behavior

<?php

$path = tempnam(sys_get_temp_dir(),"gzip_"); $file = gzopen($path,"wb"); gzwrite($file,"done"); gzclose($file); echo is_file($path) ? "File closed" : "Missing"; unlink($path);

Output:

File closed

Practical Example: Applying the Function

<?php

$path = tempnam(sys_get_temp_dir(),"gzip_"); $file = gzopen($path,"wb"); gzwrite($file,"report"); gzclose($file); $file = gzopen($path,"rb"); echo gzread($file,100); gzclose($file); unlink($path);

Output:

report

Important Behavior and Edge Cases

Close before reading back written data to ensure compression buffers are finalized.

Comparison With Related Functions

Common Beginner Mistakes

Key Takeaways

• Closes a gzip file stream.
• Close before reading back written data to ensure compression buffers are finalized.
• fclose() closes a normal stream; gzclose() closes a gzip stream.

Use gzclose() for the specific operation demonstrated above. Check its prerequisites and handle failure conditions before using it with production data.