imagecrop

(PHP 5 >= 5.5.0, PHP 7)

imagecrop — Crop an image to the given rectangle

说明

imagecrop ( resource $image , array $rect ) : resource

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())返回的图象资源。
rect: The cropping rectangle as array with keys x, y, width and height.

返回值

Return cropped image resource on success 或者在失败时返回 FALSE.

范例

Example #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

User Contributed Notes

shaun at slickdesign dot com dot au 29-Nov-2017 06:40


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 );

?>

vanadragos at yahoo dot com 25-Oct-2017 03:09


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);

robert at woodst dot com 01-Jul-2016 05:48


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)