php抛出异常

<?php
 
/**
 * 错误异常处理
 */
 
$arr = [
     
    'data' => 'hello world',
];
 
 
$res = '123';
 
printData(check($res));
 
printData(check($arr));
 
 
/**
 * Array
(
[line] => 21
[file] => 21
[msg] => not is array
)
Array
(
[data] => hello world
)
 *
 */
 
function check($x){
 
    try{
        if(!is_array($x)) {
 
            throw new Exception('not is array');
        }
 
    }catch(Exception $e){
 
        $data['line'] = $e->getLine();
        $data['file'] = $e->getLine();
        $data['msg'] = $e->getMessage();
        return $data;
    }
 
    return $x;
}
 
$item = '123';
 
$row = [
    '0'=>1,
];
 
 
print_r(checkString($item));
 
print_r(checkString($row));
 
/*
 * Fatal error:  Uncaught Exception: 不是字符串 in D:\xampp\htdocs\phperror.php:77
Stack trace:
#0 D:\xampp\htdocs\phperror.php(62): checkString(Array)
#1 {main}
  thrown in D:\xampp\htdocs\phperror.php on line 82
 
 
Array
(
    [0] => 1
)
 */
 
function checkString($y){
 
    if(!is_string($y)){
 
        throw new Exception('不是字符串');
    }
 
    return $y;
 
}
 
 
function printData($data){
 
    echo '<pre class="brush:php;toolbar:false">';
 
    print_r($data);
}