php: try-catch not catching all exceptions

问题

I'm trying to do the following:

try {
    // just an example
    $time      = 'wrong datatype';
    $timestamp = date("Y-m-d H:i:s", $time);
} catch (Exception $e) {
    return false;
}
// database activity here

In short: I initialize some variables to be put in the database. If the initialization fails for whatever reason - e.g. because $time is not the expected format - I want the method to return false and not input wrong data into the database.

However, errors like this are not caught by the 'catch'-statement, but by the global error handler. And then the script continues.

Is there a way around this? I just thought it would be cleaner to do it like this instead of manually typechecking every variable, which seems ineffective considering that in 99% of all cases nothing bad happens.

回答1:

Solution #1

Use ErrorException to turn errors into exceptions to handle:

function exception_error_handler($errno, $errstr, $errfile, $errline ) {
    throw new ErrorException($errstr, $errno, 0, $errfile, $errline);
}
set_error_handler("exception_error_handler");

Solution #2

try {
    // just an example
    $time      = 'wrong datatype';
    if (false === $timestamp = date("Y-m-d H:i:s", $time)) {
        throw new Exception('date error');
    }
} catch (Exception $e) {
    return false;
}

回答2:

try {
  // call a success/error/progress handler
} catch (\Throwable $e) { // For PHP 7
  // handle $e
} catch (\Exception $e) { // For PHP 5
  // handle $e
}

回答3:

The shorter that I have found:

set_error_handler(function($errno, $errstr, $errfile, $errline ){
    throw new ErrorException($errstr, $errno, 0, $errfile, $errline);
});

Makes all errors becoming instance of catchable ErrorException

回答4:

catch(Throwable $e) works catch ( Throwable $e){ $msg = $e-> getMessage(); }

来源：https://stackoverflow.com/questions/15461611/php-try-catch-not-catching-all-exceptions

标签

php

exception

try-catch