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:
Example 1. Example to handle an error during creation
<?php function LoadJpeg($imgname) { $im = @imagecreatefromjpeg($imgname); /* Attempt to open */ if (!$im) { /* See if it failed */ $im = imagecreatetruecolor(150, 30); /* Create a black 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; } ?>
Note: JPEG support is only available if
PHP was compiled against GD-1.8 or later.
Tip: You can use a URL as a
filename with this function if the fopen wrappers have been enabled.
See fopen() for more details on how to specify
the filename and Appendix M for a list of supported
URL protocols.
Warning
Windows versions of PHP
prior to PHP 4.3.0 do not support accessing remote files via this function, even if
allow_url_fopen is enabled.
