`yf_dynamic_image` user module

File	`plugins/dynamic/modules/dynamic/yf_dynamic_image.class.php`
Use	`module('dynamic_image'), URL ?object=dynamic_image`

Public properties

A site sets them in its config with $PROJECT_CONF['dynamic_image']['NAME'] = ...;

Property	Default	Description
`$_parent`	`null`

Public methods 7

captcha_image

public function captcha_image()

    public function captcha_image()
    {
        return _class('captcha')->show_image();
    }

image

public function image()

Display 'dynamic' image (block hotlinking).

    public function image()
    {
        no_graphics(true);
        if (empty($_SERVER['HTTP_REFERER']) || ! defined('WEB_PATH') || substr(($_SERVER['HTTP_REFERER'] ?? ''), 0, strlen(WEB_PATH)) !== WEB_PATH) {
            return $this->_show_error_image();
        }
        $img = trim(($_GET['id'] ?? ''), '/');
        $path = PROJECT_PATH . $img;
        if ( ! strlen($img) || false !== strpos($img, '..')) {
            return $this->_show_error_image();
        }
        if ( ! file_exists($path) || ! filesize($path)) {
            return $this->_show_error_image();
        }
        $ext = pathinfo($path, PATHINFO_EXTENSION);
        $allowed_exts = [
            'jpg' => 'image/jpeg',
            'jpeg' => 'image/jpeg',
            'gif' => 'image/gif',
            'png' => 'image/png',
        ];
        if ( ! $ext || ! isset($allowed_exts[$ext])) {
            return $this->_show_error_image();
        }
        @header('Content-Type: ' . $allowed_exts[$ext], $force = true);
        readfile($path);
        exit();
    }

placeholder

public function placeholder()

Output sample placeholder image, useful for designing wireframes and prototypes.

    public function placeholder()
    {
        no_graphics(true);

        list($id, $ext) = array_pad(explode('.', ($_GET['id'] ?? '')), 2, null);
        list($w, $h) = array_pad(explode('x', $id), 2, null);
        $w = (int) $w ?: 100;
        $h = (int) $h ?: 100;
        $params['color_bg'] = ($_GET['page'] ?? null) ? preg_replace('[^a-z0-9]', '', $_GET['page']) : '';

        require_once YF_PATH . 'functions/yf_placeholder_img.php';
        echo yf_placeholder_img($w, $h, $params);

        exit;
    }

placeholder_img

public function placeholder_img($extra = [])

Helper to output placeholder image, by default output is data/image.

    public function placeholder_img($extra = [])
    {
        if ( ! is_array($extra)) {
            $extra = [];
        }
        $w = (int) $extra['width'];
        $h = (int) $extra['height'];
        if ($extra['as_url']) {
            $extra['src'] = url('/dynamic/placeholder/' . $w . 'x' . $h);
        } else {
            require_once YF_PATH . 'functions/yf_placeholder_img.php';
            $img_data = yf_placeholder_img($w, $h, ['no_out' => true] + (array) $extra);
            $extra['src'] = 'data:image/png;base64,' . base64_encode($img_data);
        }
        return '<img' . _attrs($extra, ['src', 'type', 'class', 'id']) . ' />';
    }

Methods starting with `_` hooks and helpers; not routable as page actions

__call

public function __call($name, $arguments)

Catch missing method call.

    public function __call($name, $arguments)
    {
        trigger_error(__CLASS__ . ': No method ' . $name, E_USER_WARNING);
        return false;
    }

__construct

public function __construct()

    public function __construct()
    {
        $this->_parent = module('dynamic');
    }

_show_error_image

public function _show_error_image()

Display image with error text inside.

    public function _show_error_image()
    {
        @header('Content-Type: image/gif', $force = true);
        echo base64_decode('R0lGODlhAQABAID/AMDAwAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==');
        exit();
    }

yf_dynamic_image user module