PHP 4- ignore parse errors?

Question

I have a script that uses a PHP 5 syntax that's apparently not supported in PHP 4.

like MyClass::method()->method(...)

I'm trying to display a error at the beginning of the script telling that the server doesn't have PHP 5 installed, and "die" nicely, but I can't because I get that stupid parse error...

So how can I make PHP ignore errors if < 5 ?

Why do you still have to deal with PHP 4 in the first place? — Pekka, Aug 26 '11 at 11:40
Cannot work around parser failures. You can check the `PHP_VERSION` constant though and write a nicer error message. But not in the same script, you have to test it **before** the potentially failing code gets invoked. — mario, Aug 26 '11 at 11:42
why does PHP have to "parse" the code first, why doesn't just execute it? — Jaaa, Aug 26 '11 at 11:45

score 5 · Accepted Answer · answered Aug 26 '11 at 11:40

The easiest way I can think of is to have one file that includes another if PHP5 is installed:

//index.php
if (intval(substr(phpversion(), 0, 1)) < 5) {
    die ('you must have PHP 5 installed');
} else {
    include('main.php');
}

//main.php
MyClass::method()->method(); // or whatever

score 2 · Answer 2 · answered Aug 26 '11 at 11:42

2

    if (version_compare(PHP_VERSION, '5.0.0', '<')) {
        die('PHP is to old.');
    }

http://de3.php.net/manual/en/function.version-compare.php

http://www.php.net/manual/en/reserved.constants.php#reserved.constants.core

or

http://php.net/manual/en/function.phpversion.php

answered Aug 26 '11 at 11:42

coding Bott

4,287
1
27
44

This, of course, is the correct solution. Correct but for the typo, that is ;) – ty812 Aug 26 '11 at 11:43
Will not work because the parse error triggers before any code is executed. – Pekka Aug 26 '11 at 11:43
sure, that must part of the bootstrap process – coding Bott Aug 26 '11 at 11:45

score 0 · Answer 3 · answered Aug 26 '11 at 11:40

0

It can't ignore the errors, however it can die nicely if error_reporting(0);

answered Aug 26 '11 at 11:40

lukas.pukenis

13,057
12
47
81

1

Will not work because the parse error triggers before any code is executed. – Pekka Aug 26 '11 at 11:43

score 0 · Answer 4 · answered Aug 26 '11 at 11:41

0

if ((int)phpversion() < 5){
  error_reporting(0);
}

answered Aug 26 '11 at 11:41

k102

7,861
7
49
69

1

Will not work because the parse error triggers before any code is executed. – Pekka Aug 26 '11 at 11:42

PHP 4- ignore parse errors?

4 Answers4