imagecreatefromjpeg

(PHP 3>= 3.0.16, PHP 4 , PHP 5)

imagecreatefromjpeg -- Create a new image from file or URL

Description

resource imagecreatefromjpeg ( string filename )

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

imagecreatefromjpeg() 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 JPEG:

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

<?php
function LoadJpeg($imgname)
{
    
$im = @imagecreatefromjpeg($imgname); /* Attempt to open */
    
if (!$im) { /* See if it failed */
        
$im  = imagecreate(150, 30); /* Create a blank image */
        
$bgc = imagecolorallocate($im, 255, 255, 255);
        
$tc  = imagecolorallocate($im, 0, 0, 0);
        
imagefilledrectangle($im, 0, 0, 150, 30, $bgc);
        
/* Output an errmsg */
        
imagestring($im, 1, 5, 5, "Error loading $imgname", $tc);
    }
    return
$im;
}
?>

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

Tip: M�ete pou�i� URL ako n�zov s�boru s touto funkciou ak boli fopen wrappery povolen�. Pozri fopen() pre viac detailov ako ur�i� n�zov s�boru a Dodatok L pre zoznam podporovan�ch URL protokolov.

Varovanie

Windows verzie PHP star�ie ne� PHP 4.3.0 nepodporuj� pristupovanie k vzdialen�m s�borom cez t�to funkciu, aj ke� je allow_url_fopen povolen�.