php image scaler, (supporting "gif", "png" and "jpeg")

[oz11]

<?php 

function resize_image($image_name) {
    echo $image_name = "images/".$image_name;
     $path_parts = pathinfo('$image_name');
     $path_parts['extension'];
     
if ($path_parts['extension'] = "jpg") {

            // Assign image file to variable 
            //$image_name; 
                
            // Load image file 
            $image =  imagecreatefromjpeg ($image_name);  
            list($width, $height) = getimagesize($image_name);

            $new_width = 300;
            $new_height = ($height/$width)*$new_width;

            // Use imagescale() function to scale the image
            $img = imagescale( $image, $new_width, $new_height );
            
             //Output image in the browser 
            header("Content-type: image/jpeg"); 
            imagejpeg($img); 
            
} if ($path_parts['extension'] = "png"){ 
            //echo "png ;)";
            //$image_name = 
            //'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-15.png'; 
                 
            // Load image file 
            $image = imagecreatefrompng($image_name);  
            list($width, $height) = getimagesize($image_name);
              
            // Use imagescale() function to scale the image
            $img = imagescale( $image, 300,  ($height/$width)*$new_width );
              
            // Output image in the browser 
            header("Content-type: image/png"); 
            imagepng($img);
        } if ($path_parts['extension'] = "gif"){ 
            //echo "png ;)";
            //$image_name = 
            //'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-15.png'; 
                 
            // Load image file 
            $image = imagecreatefromgif($image_name);  
            list($width, $height) = getimagesize($image_name);
              
            // Use imagescale() function to scale the image
            $img = imagescale( $image, 300,  ($height/$width)*$new_width );
              
            // Output image in the browser 
            header("Content-type: image/gif"); 
            imagegif($img);
        }
}

$image_name = $_GET['name'];
resize_image($image_name ) ;

?> 

Hey, i'm having some trouble with this code I've written. It works when using remote website's images, though wont work when i point it to files on my host. Took me a while to write the code (im a noob), but cannot get it to work. Any suggestions?

ps: It'a also kinda slow, maybe it will speed up when using local content/images, though im not sure? Is this a bad solution in your opinions?

Thanks.

Edited July 13, 2022 by oz11

[mac_gyver]

one = is an assignment operator. two == is a comparison operator. your if ($path_parts['extension'] = "jpg") { statements are assigning the string on the right to the $path_parts['extension'] variable, then testing the result, which will be a true value, so, each comparison will always be true.

[oz11]

Hey mac_gyver. Thanks for the feedback.. I've changed the code a bit and swapped stuff around. Tho now its just showing up as white squares. Not sure where to go from here.

<?php 

function resize_image($image_name) {
    $path_parts = pathinfo($image_name);
    $path_parts['extension'];
    //$image_name = 'https://i.kym-cdn.com/photos/images/newsfeed/001/708/961/9e1.png';
        
    if ($path_parts['extension'] == "jpg") {
        echo "jpeg";
        $image = imagecreatefromjpeg($image_name);  
        $img = imagescale( $image, 500, 400 );
        header("Content-type: image/jpeg"); 
        imagejpeg($img);
                
    } if ($path_parts['extension'] == "png"){ 
        echo "png ;)";
        $image = imagecreatefrompng($image_name);  
        $img = imagescale( $image, 500, 400 );
        header("Content-type: image/png"); 
        imagepng($img);

    } if ($path_parts['extension'] == "gif"){ 
        echo "gif ;)";
        $image = imagecreatefromgif($image_name);  
        $img = imagescale( $image, 500, 400 );
        header("Content-type: image/gif"); 
        imagegif($img);
    }
}

resize_image($_GET['name']) ;

?> 

 

[Barand]

Remove those echo "jpeg"; etc.

You can't have output before a header();

[oz11]

omg. it worked. thanks ALOT comrade.   

[oz11]

Just going to place this here also...

<?php 

function resize_image($image_name) {
    //$image_name = 'https://c.tenor.com/GnSnviXkCR4AAAAd/memes.gif';
    $image_name = $image_name;

    $path_parts = pathinfo($image_name);
    $path_parts['extension'];
        
    if ($path_parts['extension'] == "jpg") {
        //echo "jpeg";
        list($width, $height) = getimagesize($image_name);
        $new_width = 300;
        $new_height = ($height/$width)*$new_width;
        $image = imagecreatefromjpeg($image_name);  
        $img = imagescale( $image, $new_width, $new_height );
        header("Content-type: image/jpeg"); 
        imagejpeg($img);
                
                
    } if ($path_parts['extension'] == "png"){ 
        //echo "png ;)";
        list($width, $height) = getimagesize($image_name);
        $new_width = 300;
        $new_height = ($height/$width)*$new_width;
        $image = imagecreatefrompng($image_name);
        $img = imagescale( $image, $new_width, $new_height );
        header("Content-type: image/png"); 
        imagepng($img);

    } if ($path_parts['extension'] == "gif"){ 
        //echo "gif ;)";
        list($width, $height) = getimagesize($image_name);
        $new_width = 300;
        $new_height = ($height/$width)*$new_width;
        $image = imagecreatefromgif($image_name); 
        $img = imagescale( $image, $new_width, $new_height );
        header("Content-type: image/gif"); 
        imagegif($img);
    }
    // Later support 
}

resize_image("https://c.tenor.com/GnSnviXkCR4AAAAd/memes.gif") ;

?> 

This uses the aspect ratio of original file. 

 

Enjoi