PHP – how to Convert JPG-GIF image to PNG formart

PHP – how to Convert JPG-GIF image to PNG formart

In this post we will show you how to JPG-GIF image to PNG in php . hear we use imagepng() for conver image formart.

How to use it imagepng()::

imagepng(imagecreatefromstring(file_get_contents($filename)), "output.png");

You would use $_FILES["user_image"]["tmp_name"] for the user_image(for get file name from user), and a different output user_image obviously. But the image format probing itself become redundant.

Method :: 1 # Convert JPG/GIF image to PNG using if-else

<!-- Convert JPG/GIF image to PNG --->
<form method="post" enctype="multipart/form-data">
	<p>Convert JPG/GIF image to PNG</p><br>
	<input type="file" name="user_image" /><br>
	<input type="submit" name="submit" value="Submit" />
</form>

<?php
// submit button press/hit 
if(isset($_POST['submit']))
{
    if(exif_imagetype($_FILES['user_image']['tmp_name']) ==  IMAGETYPE_GIF) 
    {
		// Convert GIF to png image type
        $new_png_img = 'user_image.png';
        $png_img = imagepng(imagecreatefromgif($_FILES['user_image']['tmp_name']), $new_png_img);
    }
    elseif(exif_imagetype($_FILES['user_image']['tmp_name']) ==  IMAGETYPE_JPEG) 
    {
		// Convert JPG/JPEG to png image type
        $new_png_img = 'user_image.png';
        $png_img = imagepng(imagecreatefromjpeg($_FILES['user_image']['tmp_name']), $new_png_img);
    }
    else 
    {
		// already png image type
        $new_png_img = 'user_image.png';
    }       
}
?>

Method :: 2 # Convert JPG/GIF image to PNG using switch case

<!-- Convert JPG/GIF image to PNG --->
<form method="post" enctype="multipart/form-data">
	<p>Convert JPG/GIF image to PNG</p><br>
	<input type="file" name="user_image" /><br>
	<input type="submit" name="submit" value="Submit" />
</form>

<?php
// submit button press/hit 
if(isset($_POST['submit']))
{
	$conver_image = $_FILES['user_image']['tmp_name'];
	$extension = pathinfo($conver_image, PATHINFO_EXTENSION); 
	switch ($extension) {
		case 'jpg':
		case 'jpeg':
		   $set_image = imagecreatefromjpeg($conver_image);
		break;
		case 'gif':
		   $set_image = imagecreatefromgif($conver_image);
		break;
		case 'png':
		   $set_image = imagecreatefrompng($conver_image);
		break;
	}

	imagepng($set_image, $new_conver_image);
}
?>

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