PHP Pass by reference in foreach -

this question has answer here:

i have code:

$a = array ('zero','one','two', 'three');  foreach ($a &$v) {  }  foreach ($a $v) {   echo $v.php_eol; }

can explain why output is: 0 1 2 two .

from zend certification study guide.

because on second loop, $v still reference last array item, it's overwritten each time.

you can see that:

$a = array ('zero','one','two', 'three');  foreach ($a &$v) {  }  foreach ($a $v) {   echo $v.'-'.$a[3].php_eol; }

as can see, last array item takes current loop value: 'zero', 'one', 'two', , it's 'two'... : )

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