Strict Standards: Only variables should be passed by reference in... on line 777

Question

I get an error on some pages of my website:

Strict Standards: Only variables should be passed by reference in /home/... on line 777

here is this line:

$arg_list = $this->_compile_arg_list('function', $tag_command, $attrs, $_cache_attrs='');

What should I change? Any help is appreciated.

The problem solved, thanks.

`$_cache_attrs=''` looks suspicious but I've never used this function. — MightyPork, Dec 03 '13 at 17:17
Welcome to Stack Overflow. You can format source code with the [Code Sample `{}`](http://i.stack.imgur.com/VYd26.png) toolbar button—I've done it for you this time. — Álvaro González, Dec 03 '13 at 17:18
You might want to add the signature of the called method. However it's the first or fourth argument that causes you trouble. — Rangad, Dec 03 '13 at 17:19
is this some newly present in PHP 5.4+? We all like the PHP upgrades so much... — Tomas, Dec 03 '13 at 17:36
If the problem is solved, please ask the good comment to make an answer, and accept it. — user2987828, Dec 03 '13 at 17:36
possible duplicate of [Strict Standards: Only variables should be passed by reference](http://stackoverflow.com/questions/2354609/strict-standards-only-variables-should-be-passed-by-reference) — Lorenz Meyer, Jun 21 '14 at 08:31

score 1 · Answer 1 · answered Dec 03 '13 at 17:20

1

<?php

function foo(&$a){
}

$a = 33;
foo($a); // OK

foo(33); // Fatal error: Only variables can be passed by reference

So fix your code accordingly.

answered Dec 03 '13 at 17:20

Álvaro González

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score 0 · Answer 2 · answered Dec 03 '13 at 17:21

0

You cannot assign a value in a function call that expects a variable by reference, if you need a default behavior you can set that up in the function itself or before calling it.

$_cache_attrs = '';
$arg_list = $this->_compile_arg_list('function', $tag_command, $attrs, $_cache_attrs);

answered Dec 03 '13 at 17:21

php_nub_qq

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@user3062493 Feel free to accept an answer if it works and fits your question – Daniel W. Dec 04 '13 at 10:43

score 0 · Answer 3 · answered Dec 03 '13 at 17:23

0

maybe 'function' should be callable..

$function = function() { };
$arg_list = $this->_compile_arg_list(
    $function,
    $tag_command,
    $attrs,
    $_cache_attrs=''
);

answered Dec 03 '13 at 17:23

Daniel W.

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13
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Strict Standards: Only variables should be passed by reference in... on line 777

3 Answers3