imagecreatefromwbmp

(PHP 4 >= 4.0.1, PHP 5)

imagecreatefromwbmp -- Create a new image from file or URL

Description

resource imagecreatefromwbmp ( string filename)

imagecreatefromwbmp() returns an image identifier representing the image obtained from the given filename.

imagecreatefromwbmp() returns an empty string on failure. It also outputs an error message, which unfortunately displays as a broken link in a browser. To ease debugging the following example will produce an error WBMP:

Eksempel 1. Example to handle an error during creation (courtesy vic at zymsys dot com)

<?php
function LoadWBMP($imgname)
{
    
$im = @imagecreatefromwbmp($imgname); /* Attempt to open */
    
if (!$im) { /* See if it failed */
        
$im  = imagecreate (20, 20); /* Create a blank image */
        
$bgc = imagecolorallocate($im, 255, 255, 255);
        
$tc  = imagecolorallocate($im, 0, 0, 0);
        
imagefilledrectangle($im, 0, 0, 10, 10, $bgc);
        
/* Output an errmsg */
        
imagestring($im, 1, 5, 5, "Error loading $imgname", $tc);
    }
    return
$im;
}
?>

Bemærk: WBMP support is only available if PHP was compiled against GD-1.8 or later.

Vink: Du kan bruge en URL som filnavn med denne funktion, hvis fopen wrappers er slået til. Se fopen() for flere detaljer omkring hvordan man udformer filnavnet og Appendiks L for en liste over understøttede URL-protokoller.

Advarsel

Windows versioner af PHP før PHP 4.3.0 understøtter ikke adgang til fjernfiler via denne funktion, også selv om allow_url_fopen er slået til.