Zabbix

<?php

/*

** Zabbix

** Copyright (C) 2001-2022 Zabbix SIA

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

** GNU General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

​

function get_default_image() {

    $image = imagecreate(50, 50);

    $color = imagecolorallocate($image, 250, 50, 50);

    imagefill($image, 0, 0, $color);

​

    return $image;

}

​

/**

 * Get image data from db, cache is used

 * @param  $imageid

 * @return array image data from db

 */

function get_image_by_imageid($imageid) {

    static $images = [];

​

    if (!isset($images[$imageid])) {

        $row = DBfetch(DBselect('SELECT i.* FROM images i WHERE i.imageid='.zbx_dbstr($imageid)));

        $images[$imageid] = $row;

    }

    return $images[$imageid];

}

​

/**

 * Resizes the given image resource to the specified size keeping the original

 * proportions of the image.

 *

 * @param resource $source

 * @param int $thumbWidth

 * @param int $thumbHeight

 *

 * @return resource

 */

function imageThumb($source, $thumbWidth = 0, $thumbHeight = 0) {

    $srcWidth   = imagesx($source);

    $srcHeight  = imagesy($source);

​

    if ($srcWidth > $thumbWidth || $srcHeight > $thumbHeight) {

        if ($thumbWidth == 0) {

            $thumbWidth = $thumbHeight * $srcWidth / $srcHeight;

        }

        elseif ($thumbHeight == 0) {