In php, we can use getimagesize to obtain the image size, which is very inefficient. First, we need to obtain the entire image information and then perform operations, the example below is more scientific and better algorithm. let's take a look. The following method can be used... in php, we can use getimagesize to obtain the image size, which is very inefficient. First, we need to obtain the entire image information and then perform operations, the example below is more scientific and better algorithm. let's take a look.
The following method can be used to quickly obtain image size information:
1. get the size information of JPEG images
2.
$url='http://www.phprm.com /images/201203/08/1331189004_28093400.jpg';$image_content = file_get_contents($url);$image = imagecreatefromstring($image_content);$width = imagesx($image);$height = imagesy($image);echo $width.'*'.$height."nr";
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Reprint ^ at will, but please attach the tutorial address.
