PHPでよく使うやつ

util.php

<?php
class Util{
    // アンダースコア「_」区切りでCamelCaseに変換する
    public static function toCamelCase($string){
        $camel_case	= "";
        $string_arr	= explode("_", $string);

        foreach($string_arr as $name){
            if(empty($name)){ continue; }

            $camel_case .= ucwords($name);
        }

        return $camel_case;
    }
    
    public static function jsonDump($obj){
        return json_encode($obj, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP);
    }

    public static function jsonParse($json_str){
        return json_decode($json_str, true);
    }

    // htmlspecialcharsショートカット
    public static function h($string){
        if(is_array($string)){
            return array_map('Util::h', $string);
        }
        else{
            return htmlspecialchars($string, ENT_QUOTES, "UTF-8");
        }
    }
}