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@sbrl sbrl/errorimage.php
Created Oct 22, 2019

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[errorimage.php] Generate error images on the fly in portable PHP
/**
* Creates an images containing the specified text.
* Useful for sending errors back to the client.
* @package core
* @param string $text The text to include in the image.
* @param int $target_size The target width to aim for when creating
* the image. Not not specified, a value is
* determined automatically.
* @return resource The handle to the generated GD image.
*/
function errorimage($text, $target_size = null)
{
$width = 0;
$height = 0;
$border_size = 10; // in px, if $target_size isn't null has no effect
$line_spacing = 2; // in px
$font_size = 5; // 1 - 5
$font_width = imagefontwidth($font_size); // in px
$font_height = imagefontheight($font_size); // in px
$text_lines = array_map("trim", explode("\n", $text));
if(!empty($target_size)) {
$width = $target_size;
$height = $target_size * (2 / 3);
}
else {
$height = count($text_lines) * $font_height +
(count($text_lines) - 1) * $line_spacing +
$border_size * 2;
foreach($text_lines as $line)
$width = max($width, $font_width * mb_strlen($line));
$width += $border_size * 2;
}
$image = imagecreatetruecolor($width, $height);
imagefill($image, 0, 0, imagecolorallocate($image, 250, 249, 251)); // Set the background to #faf8fb
$i = 0;
foreach($text_lines as $line) {
imagestring($image, $font_size,
($width / 2) - (($font_width * mb_strlen($line)) / 2),
$border_size + $i * ($font_height + $line_spacing),
$line,
imagecolorallocate($image, 68, 39, 113) // #442772
);
$i++;
}
return $image;
}
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