<?php$site = "https://www.w3schools.com/"; fopen($site,"r") or exit("Unable to connect to $site"); ?> Definition and UsageThe exit() function prints a message and terminates the current script.Syntaxexit(message) Parameter ValuesParameterDescription message Required. A message or status...
<?php // 设置错误报告级别 error_reporting(E_ALL); // 注册自定义错误处理函数 function custom_error_handler($error_number, $error_message, $error_file, $error_line) { echo "Error: [$error_number] $error_message in $error_file on line $error_line"; } set_error_handler("custom_error_...
'()' . PHP_EOL; }}function shutdown(){ echo 'Shutdown: ' . __FUNCTION__ . '()' . PHP_EOL;}$foo = new Foo();register_shutdown_function('shutdown');exit();echo 'This will not be output.';?> 以上示例会输出: Shutdown: shutdown() Destruct: Foo::__destruct() 示例#4 exit...
If status is a string, this function prints the status just before exiting.If status is an integer, that value will be used as the exit status and not printed. Exit statuses should be in the range 0 to 254, the exit status 255 is reserved by PHP and shall not be used. The status ...
<?php echo "hello"; exit; ?> <?php echo "world"; ?> 语法格式:void表示没有返回值。 void exit ([ string $status ] ) void exit ( int $status ) If status is a string, this function prints the status just before exiting. 如果status是一段字符串,这个函数在脚本退出前打印status。
defined('IN_TIPASK') && exit('Access Denied'); 这一行代码的主要功能是检查一个特定的常量是否存在。具体来说，defined() 函数用于确定 'IN_TIPASK' 这个常量是否已被定义。如果这个常量不存在，defined() 返回 false，此时 !defined('IN_TIPASK') 将返回 true。此时，exit('Access Denied') 将...
比如一篇php文本包括一下代码,则不输出为world。 <?php echo "hello"; exit; ?> <?php echo "world"; ?> 语法格式:void表示没有返回值。 void exit ([ string $status ] ) void exit ( int $status ) If status is a string, this function prints the status just before exiting. ...
代码2: <?phpfunctiongetData(){return[]; }$data=getData();if(empty($data)){exit('data is null!'); } 从以上两个代码片段来总结: die主要用于不可预测的、意外的程序终止(非主观)。 exit主要用于想要程序终止(主观)。
PHP in a Nutshell by Paul Hudson Name exit() Synopsis void exit ( [mixed status] ) The exit() function takes just one optional parameter and immediately terminates execution of the script. If you pass it a parameter, this is used as the script exit code. If it is a string, it is ...
用的phpcms吧，这个语句的意思就是系统判断是否定义了“IN_PHPCMS”这个静态变量，如果没定义就退出当前程序显示No permission resources