color.install

<?php


/**
 * @file
 * Install, update and uninstall functions for the color module.
 */

/**
 * Implements hook_requirements().
 */
function color_requirements($phase) {
    $requirements = [];
    if ($phase == 'runtime') {
        // Check for the PHP GD library.
        if (function_exists('imagegd2')) {
            $info = gd_info();
            $requirements['color_gd'] = [
                'value' => $info['GD Version'],
            ];
            // Check for PNG support.
            if (!function_exists('imagecreatefrompng')) {
                $requirements['color_gd']['severity'] = REQUIREMENT_WARNING;
                $requirements['color_gd']['description'] = t('The GD library for PHP is enabled, but was compiled without PNG support. Check the <a href="http://php.net/manual/ref.image.php">PHP image documentation</a> for information on how to correct this.');
            }
        }
        else {
            $requirements['color_gd'] = [
                'value' => t('Not installed'),
                'severity' => REQUIREMENT_ERROR,
                'description' => t('The GD library for PHP is missing or outdated. Check the <a href="http://php.net/manual/book.image.php">PHP image documentation</a> for information on how to correct this.'),
            ];
        }
        $requirements['color_gd']['title'] = t('GD library PNG support');
    }
    return $requirements;
}