Error::getPrevious
(PHP 7, PHP 8)
Error::getPrevious — 返回先前的 Throwable
参数
此函数没有参数。
返回值
如果有的话，返回先前的 Throwable，否则返回 null 。
示例
示例 #1 Error::getPrevious() 例子
循环输出错误栈。
<?php
class MyCustomError extends Error {}
function doStuff() {
try {
throw new InvalidArgumentError("You are doing it wrong!", 112);
} catch(Error $e) {
throw new MyCustomError("Something happened", 911, $e);
}
}
try {
doStuff();
} catch(Error $e) {
do {
printf("%s:%d %s (%d) [%s]\n", $e->getFile(), $e->getLine(), $e->getMessage(), $e->getCode(), get_class($e));
} while($e = $e->getPrevious());
}
?>以上示例的输出类似于：
/home/bjori/ex.php:8 Something happened (911) [MyCustomError] /home/bjori/ex.php:6 You are doing it wrong! (112) [InvalidArgumentError]
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