note 126158 added to function.reset
| From: | turabgarip at gmail dot com | Date: | Wed, 09 Jun 2021 14:32:40 +0000 |
| Subject: | note 126158 added to function.reset | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-216506@lists.php.net to get a copy of this message | ||
Since reset() returns the first "value" of the array beside resetting its internal
pointer; it will return different results when it is combined with key() or used separately. Like;
<?php
$products = array(
'biscuits' => array('biscuit1' => 'cobis',
'biscuit2' => 'probis'),
'chocolates' => array('coco1' => 'cococ', 'coco2'
=> 'prococ'),
);
echo key(reset($products['biscuits'])); // Fatal error
reset($products['biscuits']);
echo key($products['biscuits']); // Will print 'biscuit1'
?>
This is perfectly normal because in the first method, reset() returned the first "value"
of the 'biscuits' element which is to be "cbosi". So key(string) will cause a
fatal error. While in the second method you just reset the array and didn't use a returning
value; instead you reset the pointer and than extracted the first key of an array.
If your array has more dimensions, it won't probably cause a fatal error but you will get
different results when you combine reset() and key() or use them consecutively.
----
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----
Manual Page -- https://php.net/manual/en/function.reset.php
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