";
}//output:该字符串转换为数字 等于零。
$a='0';
if($a==''){
echo "0 等于 ''
";
} //output:0 等于''
if(trim($a)==''){
echo "trim(0)等于''
";
} //no output
if($a===''){
echo "0===''
";
} //no output
if(empty($a)){
echo "'' is empty
";
} //output:'' is empty
if(is_null($a)){
echo "0 is null
";
} //no output
if(is_numeric($a)){
echo "0 is numeric
";
} //output:0 is numeric
if(is_string($a)){
echo "0 is string
";
} //no output
if(strval($a)==''){
echo "转换成字符串的0 is ''
";
} //no output
//========= 判断 0 和 '' 以及 empty null false的关系 end =========//
//========= 判断 '' 和 0 以及 empty null false的关系 start =========//
$b = '';
if($b==0){
echo "'' 等于 0
";
} //output:'' 等于 0
if(!''){
echo "'' 就是false
";
} //output:'' 就是false
if(!0){
echo "0 就是false
";
} //output:0 就是false
//========= 判断 '' 和 0 以及 empty null false的关系 end =========//
echo "在判断空（''）的时候一定要小心，0 也相当于'' ,0 和 '' 都相当于空字符和false,判断为空最好用===";
$x = '1978-02-05';
$y = is_date($x);
$x = time();
$member_birthday = strftime ("%Y-%m-%d","{$x}");
$time = strtotime($member_birthday);
$str = NULL;
$y = '';
if(isset($str)) {
$x = 0;
}
if(empty($str)) {
$x = 1;
}
if($str == NULL) {
$x = 2;
}
if(isset($y)) {
$x = 0;
}
if(empty($y)) {
$x = 1;
}
if($y == NULL) {
$x = 2;
}
$file = "/mobile/index.php";
$ops = explode("?",$file);
$squery = $ops[1];
$params = preg_split('/&|=/', $squery);
for ($i = 0; $i < count($params); ++$i) {
$key = $params[$i];
$val = $params[++$i];
$_GET[$key] = $val;
$_POST[$key] = $val;
}
$ret = array('jsObj' => NULL,'jsArray' => array());
unset($ret['xxx']);
$ret = json_encode($ret);
define('BASE_ROOT_PATH',str_replace('\\','/',dirname(__FILE__)));
echo BASE_ROOT_PATH."\n";
require_once (BASE_ROOT_PATH . '/fooder.php');
echo $argv;
function help_out()
{
echo "fetch_goods:start fetch goods.\r\n";
echo "fillgcid:start fill all goods class id.\r\n";
echo "checkgoods:check all goods class id.\r\n";
}
$time = -microtime();
//$hash = 0;
//for ($i=0; $i < rand(1000,4000); ++$i) {
// $hash ^= md5(substr(str_shuffle("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"), 0, rand(1,10)));
//}
$time += microtime();
$y = sprintf('%f', $time);
$y = strtotime('2016-12-12 01:01:01');
$y = urldecode('%E4%B8%AD%E9%80%9A%E5%BF%AB%E9%80%92');
$x=new date();
define('StartTime', microtime(true));
define('TIMESTAMP', time());
if(count($argv) == 1) {
return;
}
$gfcgi_run = 1;
if($gfcgi_run == 0) { //模拟请求
$file = BASE_ROOT_PATH . '/debug_run.php';
include $file;
Base::mobile_init();
Base::mobile_control();
} elseif ($gfcgi_run == 1) {
$file = BASE_ROOT_PATH . '/research/research_run.php';
include $file;
} else {
Base::run_util();
$file = BASE_CRONTAB_PATH . '/crawl/fetch_goods.php';
require $file;
}
?>