<?php

if ( ! function_exists( 'exif_imagetype' ) ) {
    function exif_imagetype ( $filename ) {
        if ( ( list($width, $height, $type, $attr) = getimagesize( $filename ) ) !== false ) {
            return $type;
        }
    return false;
    }
}

function utf8json($inArray) {

    if (is_array($inArray)) {
        static $depth = 0;

        /* our return object */
        $newArray = array();

        /* safety recursion limit */
        $depth ++;
        if ($depth >= '300000') {
            return false;
        }

        /* step through inArray */
        foreach ($inArray as $key => $val) {
            if (is_array($val)) {
                /* recurse on array elements */
                $newArray[$key] = utf8json($val);
            } else {
                /* encode string values */
                $newArray[$key] = utf8_encode($val);
            }
        }
        /* return utf8 encoded array */
        return $newArray;
    }
    /* return utf8 encoded array */
    return $inArray;
}

function returnJsonWithDecode($app, $callbackFn, $retObj) {
    if ($callbackFn) {
        $app->contentType('application/javascript; Charset=UTF-8');
        echo $callbackFn . "(" . html_entity_decode(json_encode(utf8json($retObj)), ENT_COMPAT | ENT_HTML401, 'ISO-8859-1') . ")";
    } else {
        $app->contentType('application/x-json; Charset=UTF-8');
        echo html_entity_decode(json_encode(utf8json($retObj)), ENT_COMPAT | ENT_HTML401, 'ISO-8859-1');
    }
}

function returnJson($app, $callbackFn, $retObj) {
    if ($callbackFn) {
        $app->contentType('application/javascript; Charset=UTF-8');
        echo $callbackFn . "(" . (json_encode(utf8json($retObj))) . ")";
    } else {
        $app->contentType('application/x-json; Charset=UTF-8');
        echo (json_encode(utf8json($retObj)));
    }
}

function makeThumbnail($im) {
    $final_width_of_image = 300;
    $ox = imagesx($im);
    $oy = imagesy($im);

    $nx = $final_width_of_image;
    $ny = floor($oy * ($final_width_of_image / $ox));

    $nm = imagecreatetruecolor($nx, $ny);

    imagecopyresized($nm, $im, 0, 0, 0, 0, $nx, $ny, $ox, $oy);

    return $nm;
}

function getContentFromResources($res) {
    ob_start(); //Start output buffer.
    imagejpeg($res); //This will normally output the image, but because of ob_start(), it won't.
    $contents = ob_get_contents(); //Instead, output above is saved to $contents
    ob_end_clean(); //End the output buffer.

    return $contents;
}

?>