<?php

$GLOBALS['requires'] = array();
if (!function_exists('req_once')){
 function req_once($filename){
 global $requires;
 $filename = (string)$filename;
 if (empty($filename))
 return false;
 if (!$filename = realpath($filename))
 return false;
 if (isset($requires[$filename]))
 return true;
 if (!is_file($filename))
 return false;
 $requires[$filename] = true;
 return require_once $filename;
 }
}

$GLOBALS['errors'] = array();
if (!function_exists('error')) {
 function error($msg = null) {
 global $errors;
 if ($msg === null)
 return $errors;
 $msg = (string) $msg;
 if (!empty($msg))
 array_push($errors, array('time' => time(), 'text' => $msg));
 return false;
 }

}

if (!function_exists('got')){
 function got($a,$k,$default = NULL){
 if (is_array($a) && isset($a[$k])) return $a[$k];
 if (is_object($a) && isset($a->$k)) return $a->$k;
 return $default;
 }
}

if (!function_exists('eq')){//获取数组中的第$index个元素
 function eq(array $haystack,$index){
 if (!is_int($index) || empty($haystack) || (count($haystack) < $index))
 return false;
 reset($haystack);
 $i = 0;
 while ($i<$index){
 $i++;
 next($haystack);
 }
 return current($haystack);
 }
}

/*
 * 格式化输出
 */
if (!function_exists('dump')) {
 function dump() {
 $o = func_get_args();
 $is_cmd = ((PHP_SAPI === 'cli') or isset($_SERVER['argv']));
 if ($is_cmd) {
 foreach ($o as $o){
 echo var_export($o, true), "\n";
 }
 } else {
 foreach ($o as $o){
 echo '<pre>', var_export($o, true), "</pre>\n";
 }
 }
 }
}