How can I accomplish this in php? there are cases where I need to push more elements to the array that i'm looping through so they also get looped through:
$j = array(1,2,3);
foreach ($j as $i)
{
echo $i . "\n";
if ($i <= 3)
array_push($j, 5);
}
should print 123555 but it stops at 123.
is there a way around this in php?
Add & to pass the reference. Default a value (copy of $j) is passed.
$j = array(1,2,3);
foreach ($j as $i=>&$v)
{
echo "$i=>$v\n";
if ($i <= 3)
array_push($j, 5);
}
PHP does not support this. From the manual:
As foreach relies on the internal array pointer changing it within the loop may lead to unexpected behavior.
http://php.net/manual/en/control-structures.foreach.php
However, this code will work, although I would not rely on this based on what the manual said.
<?
header( 'content-type: text/plain' );
$j = array(1,2,3);
foreach ($j as &$v )
{
echo "$v\n";
if ($v <= 3)
{
array_push($j, 5);
}
}
Why don't you try while:
$i = 0;
$j = array( 1, 2, 3 );
while ( count( $j ) )
{
echo array_shift( $j );
if ( $i++ <= 3 )
{
array_push( $j, 5 );
}
}
