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Imagick::pingImage

(PECL imagick 2.0.0)

Imagick::pingImageTrae los atributos básicos de una imagen

Descripción

bool Imagick::pingImage ( string $filename )

Este método se puede usar para preguntar por el ancho, alto, tamaño y formato de la imagen sin leer toda la imagen de la memoria.

Parámetros

filename

El nombre de fichero de donde se va a leer la información.

Valores devueltos

Devuelve TRUE en caso de éxito.

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User Contributed Notes 3 notes

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0
hello at digitalnature dot eu
1 year ago
Just a warning: don't use Eero Niemi's code (identifyImage with pingImage) if you just want to get the image width and height, because it will actually be slower than reading the whole image into memory - about 10x slower!

Correct code should be:

<?php

  $image
= new Imagick();
 
$image->pingImage($file);
 
$width = $image->getImageWidth();
 
$height = $image->getImageHeight();

?>

(this is around 15 times faster than reading the image in memory)
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0
Sergey
1 year ago
If you don't sure whether the file exists or not or maybe it's broken, then you should use try - catch construction. It prevents code fails, when code stops execution after call of pingImage (if the file doesn't exist or it's broken).

<?php
$im
= new Imagick();
try {
   
$im->pingImage('3.jpg');
}
catch(
ImagickException $e) {
    echo
"image doesn't exist";
}
?>
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0
Eero Niemi (eero at eero dot info)
6 years ago
Actually the previous example causes file to be loaded twice on Imagick's stack, proper way to do this is:

<?php

$file
= 'foo.jpg';
$image = new Imagick();
$image->pingImage($file);
$image_info = $image->identifyImage();

?>
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