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liam dot wiltshire at lineone dot net ¶
16 years ago
A quick function to automatically generate a multi line image from a string, with the image size automatically calculated from the string itself.



<?php



function multilineimage($string){



    // Probably not the best way of handling newlines, but bar OS9, doesn't really cause a problem

    $string = str_replace("\r","",$string);

    $string = explode("\n",$string);



    $maxlen = 0;

    foreach ($string as $str){

        if (strlen($str) > $maxlen){

            $maxlen = strlen($str);

        }

    }



    // Set font size

    $font_size = 4;



    // Create image width dependant on width of the string

    $width  = imagefontwidth($font_size)*$maxlen;

    // Set height to that of the font

    $height = imagefontheight($font_size) * count($string);

    // Create the image pallette

    $img = imagecreate($width,$height);

    // Grey background

    $bg    = imagecolorallocate($img, 205, 255, 255);

    // White font color

    $color = imagecolorallocate($img, 0, 0, 0);



    $ypos = 0;



    foreach ($string as $str){



        $len = strlen($str);

        for($i=0;$i<$len;$i++){

            // Position of the character horizontally

            $xpos = $i * imagefontwidth($font_size);

            // Draw character

            imagechar($img, $font_size, $xpos, $ypos, $str, $color);

            // Remove character from string

            $str = substr($str, 1);   

        }

        $ypos = $ypos + imagefontheight($font_size);   

    }



    // Return the image 

    header("Content-Type: image/gif");

    imagegif($img);

    // Remove image

    imagedestroy($img);

}



multilineimage("This is an image

This is line 2\nLine 3

Line 4");



?>
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