Steven Sacradoor Steven Sacradoor - 5 months ago 26
PHP Question

How can I convert all images to jpg?

I have script:

<?php

include('db.php');
session_start();
$session_id = '1'; // User session id
$path = "uploads/";

$valid_formats = array("jpg", "png", "gif", "bmp", "jpeg");
if (isset($_POST) and $_SERVER['REQUEST_METHOD'] == "POST") {
$name = $_FILES['photoimg']['name'];
$size = $_FILES['photoimg']['size'];
if (strlen($name)) {
list($txt, $ext) = explode(".", $name);
if (in_array($ext, $valid_formats)) {
if ($size < (1024 * 1024)) { // Image size max 1 MB
$actual_image_name = time() . $session_id . "." . $ext;
$tmp = $_FILES['photoimg']['tmp_name'];
if (move_uploaded_file($tmp, $path . $actual_image_name)) {
mysql_query("UPDATE users SET profile_image='$actual_image_name' WHERE uid='$session_id'");
echo "<img src='uploads/" . $actual_image_name . "' class='preview'>";
} else {
echo "failed";
}
} else {
echo "Image file size max 1 MB";
}
} else {
echo "Invalid file format..";
}
} else {
echo "Please select image..!";
}
exit;
}

?>


Is possible convert all images (png, gif etc) to jpg with 100% quality? If yes, how? I would like allow to upload png and gif, but this script should convert this files to jpg. Is possible this with PHP?

Answer

Try this code: originalImage is the path of... the original image... outputImage is self explaining enough. Quality is a number from 0 to 100 setting the output jpg quality (0 - worst, 100 - best)

function convertImage($originalImage, $outputImage, $quality)
{
    // jpg, png, gif or bmp?
    $exploded = explode('.',$originalImage);
    $ext = $exploded[count($exploded) - 1]; 

    if (preg_match('/jpg|jpeg/i',$ext))
        $imageTmp=imagecreatefromjpeg($originalImage);
    else if (preg_match('/png/i',$ext))
        $imageTmp=imagecreatefrompng($originalImage);
    else if (preg_match('/gif/i',$ext))
        $imageTmp=imagecreatefromgif($originalImage);
    else if (preg_match('/bmp/i',$ext))
        $imageTmp=imagecreatefrombmp($originalImage);
    else
        return 0;

    // quality is a value from 0 (worst) to 100 (best)
    imagejpeg($imageTmp, $outputImage, $quality);
    imagedestroy($imageTmp);

    return 1;
}
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