Rasher's Toolbox

Removes extraneous bytes from the end of a JPEG image. Some cameras (such as Nokia cellphones) create JPEG images which contain junk at the end, causing PHP to not like them. This function removes this garbage and produces a more valid jpeg image.

Example

<?php fix_jpeg('image.jpg'); ?>


<?php
function fix_jpeg($filename) {
    $size = filesize($filename);
    $str = file_get_contents($filename);
    // Remove bytes as long as the string does not represent an image
    $i = 0;
    while (@imagecreatefromstring($str) === false) {
        // Remove the last byte before the two-byte EOI (0xFF 0xD9)
        $str = substr_replace($str, '', -3, -2);
        $i++;
        // Abort if there's no possibility of $str being a jpeg image
        if (strlen($str) < 20)
            return false;
    }
    if ($i > 0) 
        // Write changes, if anything was removed 
        return (file_put_contents($filename, $str) == strlen($str));
    else
        // Return true if nothing changed
        return true;
}
?>

fix_jpeg

Description

Example

Source