19-php Exception Handling Mechanism 2

<? PHP function checknum ($ Val) {if ($ Val> 120) {Throw new exception ("err_01: this data is too large... ") ;}Else {echo" the input value is normal ";}}try {checknum (1234);} catch (exception $ E) {# print the error message echo $ e-> getmessage (); # print the number of lines that throw the error echo $ e-> Getline () ;}?>

Key points:

1. If no try catch block is found in the purchase agent shown above, an error without exception capture will be reported.

2. If an exception occurs, you can output the error information after the capture, or you can only capture it without outputting the exception information.