(PECL imagick 2.0.0)
Imagick::pingImage — Fetch basic attributes about the image
$filename
)This method can be used to query image width, height, size, and format without reading the whole image in to memory.
filename
The filename to read the information from.
成功时返回 TRUE。
Sergey (2012-09-01 15:06:04)
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";
}
?>
Eero Niemi (eero at eero dot info) (2008-05-21 07:12:38)
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();
?>