用于PHP的imagecrop()替代方法5.5 [英] imagecrop() alternative for PHP < 5.5

问题描述

一个出于好奇心而提出的简单问题，可能会有一个复杂的答案:是否可以通过结合其他GD函数来模仿5.4之类的早期PHP 5.5版本的新的imagecrop()?

A simple question motivated by a curiosity, with probably a complex answer: Is it possible to emulate the new PHP 5.5 imagecrop() in earlier versions, like 5.4, by combining other GD functions?

Awn ..但没有imagecrop()黑线错误，请. :p

Awn.. But without the imagecrop() black line bug, please. :p

推荐答案

这应该是imagecrop()的替代品(没有bug ...):

This should be a drop-in replacement for imagecrop() (without the bug...):

function mycrop($src, array $rect)
{
    $dest = imagecreatetruecolor($rect['width'], $rect['height']);
    imagecopy(
        $dest,
        $src,
        0,
        0,
        $rect['x'],
        $rect['y'],
        $rect['width'],
        $rect['height']
    );

    return $dest;
}

用法:

$img = mycrop($img, ['x' => 10, 'y' => 10, 'width' => 100, 'height' => 100]);

请注意，该错误显然已在 PHP 5.6.12 中修复.

Note that the bug is apparently fixed in PHP 5.6.12.

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