PHP gets image size (width, height)_PHP tutorial

This article mainly explains the function of PHP to obtain the image size (width, height), that is, the getimagesize() function.

Syntax: array getimagesize( string filename [, array &imageinfo] )

Function: The getimagesize() function will determine the size of any GIF, JPG, PNG, SWF, SWC, PSD, TIFF, BMP, IFF, JP2, JPX, JB2, JPC, XBM or WBMP image file and return the file size, dimensions , file type and a height/width text string that can be used in the tag in a normal HTML file. If the specified image cannot be accessed or is not a valid image, getimagesize() will return FALSE and generate an E_WARNING level error.

Note:

(1) This function does not require GD image library support.

(2) In addition to obtaining local image or Flash related information, this function can also be used directly to obtain remote information.

Example:

<?php
list($width,$height,$type,$attr)=getimagesize("http://www.phpernote.com/images/logo.gif");
echo "Image width ".$width;
echo "<br/>";
echo "Image height ".$height;
echo "<br/>";
echo "Image type ".$type;
echo "<br/>";
echo "Attribute ".$attr;

The output information is as follows:

Image width 200

Image height 55

Image type 1

Image attribute width="200" height="55"

The parameters of the image type are as follows:

1 = GIF 5 = PSD 9 = JPC 13 = SWC

2 = JPG 6 = BMP 10 = JP2 14 = IFF

3 = PNG 7 = TIFF(intel byte order) 11 = JPX 15 = WBMP

4 = SWF 8 = TIFF (motorola byte order) 12 = JB2 16 = XBM

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http://www.bkjia.com/PHPjc/764094.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/764094.htmlTechArticleThis article mainly explains the function of PHP to obtain the image size (width, height), that is, the getimagesize() function. Syntax: array getimagesize( string filename [, array imageinfo] ) Function: ...