Clever Geek Handbook

Generating PHP warnings

How can I generate PHP custom warnings in the same way as warnings for inline functions.

For example:

php > fopen(null);
PHP Warning:  fopen() expects at least 2 parameters, 1 given in php shell code on line 1
php > fopen(null, 'w');
PHP Warning:  fopen(): Filename cannot be empty in php shell code on line 1
php > fopen(array('a'), 'w');
PHP Warning:  fopen() expects parameter 1 to be a valid path, array given in php shell code on line 1

Let's say I have a function like this:

function my_func($a, $b, $c);

What code can I use to my_func

give similar warnings when called incorrectly?

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2 answers


You are probably looking for trigger_error. They will show standard error and will be handled by error_log, display_errors, etc. In php.ini

Minimal example:



if (!DoAFunction()) {
  trigger_error("DoAFunction returned false!", E_USER_ERROR);
}
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trigger_error("Here is your herror", E_WARNING);


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