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Image placeholder php
<?php
// PHP placeholder images
// Version: 0.1
// Author: Hinerangi Courtenay - @sky_maiden
// Usage (all parameters are optional):
// <img src="placeholder.php?size=400x150&bg=eee&fg=999&text=Generated+image" alt="Placeholder image" />
// Inspired by http://placehold.it/
header ("Content-type: image/png");
// Convert hex to rgb (modified from csstricks.com)
function hex2rgb($colour)
{
$colour = preg_replace("/[^abcdef0-9]/i", "", $colour);
if (strlen($colour) == 6)
{
list($r, $g, $b) = str_split($colour, 2);
return Array("r" => hexdec($r), "g" => hexdec($g), "b" => hexdec($b));
}
elseif (strlen($colour) == 3)
{
list($r, $g, $b) = array($colour[0] . $colour[0], $colour[1] . $colour[1], $colour[2] . $colour[2]);
return Array("r" => hexdec($r), "g" => hexdec($g), "b" => hexdec($b));
}
return false;
}
// Dimensions
$getsize = isset($_GET['size']) ? $_GET['size'] : '100x100';
$dimensions = explode('x', $getsize);
// Create image
$image = imagecreate($dimensions[0], $dimensions[1]);
// predefined random colours
$colors = array('ccc','ddd','eee','111','454545','cfcfcf');
// Colours
$bg = isset($_GET['bg']) ? $_GET['bg'] : $colors[array_rand($colors)];
$bg = hex2rgb($bg);
$setbg = imagecolorallocate($image, $bg['r'], $bg['g'], $bg['b']);
$fg = isset($_GET['fg']) ? $_GET['fg'] : '555';
$fg = hex2rgb($fg);
$setfg = imagecolorallocate($image, $fg['r'], $fg['g'], $fg['b']);
// Text
$text = isset($_GET['text']) ? strip_tags($_GET['text']) : $getsize;
$text = str_replace('+', ' ', $text);
// Text positioning
$fontsize = 4;
$fontwidth = imagefontwidth($fontsize); // width of a character
$fontheight = imagefontheight($fontsize); // height of a character
$length = strlen($text); // number of characters
$textwidth = $length * $fontwidth; // text width
$xpos = (imagesx($image) - $textwidth) / 2;
$ypos = (imagesy($image) - $fontheight) / 2;
// Generate text
imagestring($image, $fontsize, $xpos, $ypos, $text, $setfg);
// Render image
imagepng($image);
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