php error handling

Solutions on MaxInterview for php error handling by the best coders in the world

showing results for - "php error handling"
Donovan
15 Sep 2016
1ini_set('display_errors', '1');
2ini_set('display_startup_errors', '1');
3error_reporting(E_ALL);
Lyam
26 Jul 2020
1<?php
2// New error handler function
3function myErrorHandler($errno$errstr$errfile$errline)
4{
5    if (!(error_reporting() & $errno)) {
6        // This error code is not included in error_reporting, so let it fall
7        // through to the standard PHP error handler
8        return false;
9    }
10
11    switch ($errno) {
12    case E_USER_ERROR:
13        echo "<b>My ERROR</b> [$errno$errstr<br />\n";
14        echo "  Fatal error on line $errline in file $errfile";
15        echo ", PHP " . PHP_VERSION . " (" . PHP_OS . ")<br />\n";
16        echo "Aborting...<br />\n";
17        exit(1);
18        break;
19
20    case E_USER_WARNING:
21        echo "<b>My WARNING</b> [$errno$errstr<br />\n";
22        break;
23
24    case E_USER_NOTICE:
25        echo "<b>My NOTICE</b> [$errno$errstr<br />\n";
26        break;
27
28    default:
29        echo "Unknown error type: [$errno$errstr<br />\n";
30        break;
31    }
32
33    /* Don't execute PHP internal error handler */
34    return true;
35}
36
37// function to test the error handling
38function scale_by_log($vect$scale)
39{
40    if (!is_numeric($scale) || $scale <= 0) {
41        trigger_error("log(x) for x <= 0 is undefined, you used: scale = $scale", E_USER_ERROR);
42    }
43
44    if (!is_array($vect)) {
45        trigger_error("Incorrect input vector, array of values expected", E_USER_WARNING);
46        return null;
47    }
48
49    $temp array();
50    foreach($vect as $pos => $value) {
51        if (!is_numeric($value)) {
52            trigger_error("Value at position $pos is not a number, using 0 (zero)", E_USER_NOTICE);
53            $value 0;
54        }
55        $temp[$pos] = log($scale) * $value;
56    }
57
58    return $temp;
59}
60
61// set to the user defined error handler
62$old_error_handler = set_error_handler("myErrorHandler");
63
64// trigger some errors, first define a mixed array with a non-numeric item
65echo "vector a\n";
66$a array(23"foo"5.543.321.11);
67print_r($a);
68
69// now generate second array
70echo "----\nvector b - a notice (b = log(PI) * a)\n";
71/* Value at position $pos is not a number, using 0 (zero) */
72$b = scale_by_log($a, M_PI);
73print_r($b);
74
75// this is trouble, we pass a string instead of an array
76echo "----\nvector c - a warning\n";
77/* Incorrect input vector, array of values expected */
78$c = scale_by_log("not array"2.3);
79var_dump($c); // NULL
80
81// this is a critical error, log of zero or negative number is undefined
82echo "----\nvector d - fatal error\n";
83/* log(x) for x <= 0 is undefined, you used: scale = $scale" */
84$d = scale_by_log($a, -2.5);
85var_dump($d); // Never reached
86?>
87
88
Mikaela
25 Apr 2016
1function handlerError(request, response){
2    response.status(500).send('opps');
3}
4
5.catch(handlerError);
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