Resource not released (ARCH7080)

Key php.performance.disposable-not-disposed · Severity warning · Category performance

A resource (e.g. a GD image handle) is opened but never released, leaking memory and OS handles. Free it explicitly when work is done.

Incorrect

<?php
function makeThumb(string $path): string
{
    $img = imagecreatefromjpeg($path);
    $out = '/tmp/thumb.jpg';
    imagejpeg($img, $out);
    return $out;
}

Correct

<?php
function makeThumb(string $path): string
{
    $img = imagecreatefromjpeg($path);
    $out = '/tmp/thumb.jpg';
    imagejpeg($img, $out);
    imagedestroy($img);
    return $out;
}

Fix

Release resource-owning objects when done with their dedicated free call (e.g. imagedestroy()).