PHP function calls returning references
Let's say we have this function:
<?php
function &collector() {
static $c = array();
return $c;
}
?>we can use this like the following (very familiar to D7 coders):
<?php
// Note that $x = collector(); won't work.
$x = &collector();
$x[] = 'foo';
?>Say you wanted to have one line code:
<?php
array_push(&collector(), 'foo');
?>PHP Fatal error: Can't use function return value in write context.
Makes sense? Not to me. However, the following works:
<?php
array_push(collector(), 'foo');
?>How can this work? Well it turns out the Zend Engine has a special case to handle this so do not try to deduce it from knowledge of how references work in general. It works "just because".
Comments
Deprecated
To be fair, if it weren't for the fatal error, you'd be getting a deprecated warning instead: "Call-time pass-by-reference has been deprecated".
Not at all if the error of
Not at all if the error of deprecated error occur then you must check your apache server version or php version mostly outdated function occur deprecated errors.
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