PHP Die Function Explained

The die function in PHP is used to output a message and terminate the script’s execution. Typically, the die function is used to immediately end the program’s execution and output a specified message when an error occurs or a specific condition is met in the script. For example:

$number = 10;
if ($number > 5) {
    die("Number is too big"); // 输出消息并终止脚本执行
}
echo "Script continues..."; // 这行代码不会被执行

In this example, if $number is greater than 5, the die function will output “Number is too big” and terminate the script, so the line “Script continues…” will not be executed.