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)
imagecrop
(PHP 5 >= 5.5.0, PHP 7, PHP 8)
imagecrop — Crop an image to the given rectangle
Descrizione
Crops an image to the given rectangular area and returns the resulting image.
The given image is not modified.
Elenco dei parametri
-
image -
Una risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().
-
rectangle -
The cropping rectangle as array with keys
x,y,widthandheight.
Valori restituiti
Return cropped image object on success o false in caso di fallimento.
Log delle modifiche
| Versione | Descrizione |
|---|---|
| 8.0.0 |
image expects a GdImage
instance now; previously, a valid gd resource was expected.
|
| 8.0.0 | On success, this function returns a GDImage instance now; previously, a resource was returned. |
Esempi
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);
?>Vedere anche:
- imagecropauto() - Crop an image automatically using one of the available modes
add a note
User Contributed Notes 3 notes
robert at woodst dot com ¶
8 years ago
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 );
?>
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);
