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imagecrop

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

imagecrop — Crop an image to the given rectangle

说明

imagecrop(GdImage $image, array $rectangle): GdImage|false

Crops an image to the given rectangular area and returns the resulting image. The given image is not modified.

参数

image: 由图象创建函数(例如imagecreatetruecolor())返回的 GdImage 对象。
rectangle: The cropping rectangle as array with keys x, y, width and height.

返回值

Return cropped image object on success 或者在失败时返回 false.

更新日志

版本	说明
8.0.0	`image` 现在需要 GdImage 实例；之前需要有效的 `gd` resource。
8.0.0	On success, this function returns a GDImage instance now; previously, a resource was returned.

示例

示例 #1 imagecrop() example

This example shows how to crop an image to a square area.

<?php
$im = imagecreatefrompng('example.png');
$size = min(imagesx($im), imagesy($im));
$im2 = imagecrop($im, ['x' => 0, 'y' => 0, 'width' => $size, 'height' => $size]);
if ($im2 !== FALSE) {
    imagepng($im2, 'example-cropped.png');
    imagedestroy($im2);
}
imagedestroy($im);
?>

参见

imagecropauto() - Crop an image automatically using one of the available modes

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User Contributed Notes 3 notes

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robert at woodst dot com ¶

8 years ago


It appears that imagecrop() will output a black line along the bottom the resulting image until version 5.6.12. Your only choices are to upgrade PHP or use imagecopyresampled().

http://php.net/ChangeLog-5.php#5.6.12 (bug #67447)

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-11

shaun at slickdesign dot com dot au ¶

6 years ago


Use imagecopyresampled to crop your image instead, and it should work correctly in PHP 5.5+ without any black lines.

<?php
// Desired function call.
$cropped = imagecrop( $image, array( 'x' => $x, 'y' => $y, 'width' => $width, 'height' => $height ) );

// Equivalent function which works in both PHP pre 5.6.12 and 5.6.12+.
$cropped = imagecreatetruecolor( $width, $height );
imagecopyresampled( $cropped, $image, 0, 0, $x, $y, $width, $height, $width, $height );
?>

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-14

vanadragos at yahoo dot com ¶

7 years ago


To get the center crop of a image in php:

            
$new = imagecreatefromjpeg($uploadedfile);

    $crop_width = imagesx($new);
    $crop_height = imagesy($new);
                
            $size = min($crop_width, $crop_height);
            
            
            if($crop_width >= $crop_height) {
            $newx= ($crop_width-$crop_height)/2;
            
            $im2 = imagecrop($new, ['x' => $newx, 'y' => 0, 'width' => $size, 'height' => $size]);
            }
            else {
                $newy= ($crop_height-$crop_width)/2;
            
                $im2 = imagecrop($new, ['x' => 0, 'y' => $newy, 'width' => $size, 'height' => $size]);
                }
            
                
    imagejpeg($im2,$filename,90);

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