while doing array search in php array search
i need to search the key for the value blue
but key for both values purple, blue
when i try the following it shows nothing
$array = array(1 => 'orange', 2 => 'yellow', 3 => 'green', 4 => 'purple','blue');
$key = array_search('blue', $array);
echo $key;
How to find the key for blue or do i need to change the $array?
First, the program you show as an example will output 5 as the key value for 'blue', as others have already pointed out.
Now if I understand what you might want, it's a way of having two elements referred to by the same index.
In that case you could simply swap keys and values, like so:
$array = array(
'orange' => 1,
'yellow' => 2,
'green' => 3,
'purple' => 4,
'blue' => 4);
echo $array['purple']; // 4
echo $array['blue' ]; // 4
In this case the maximum user assigned key is 4 i.e. purple, so it will be 5 for blue eventually... and the code what you are using exactly returns the right output which is 5.
If you do print_r() of your array you will get the idea.. See here
Array
(
[1] => orange
[2] => yellow
[3] => green
[4] => purple
[5] => blue
)
EDIT :
i need to find the key as 4 when i search for purple or blue ! how to do this
Instead modify your array like this...
<?php
$array = array(1 => 'orange', 2 => 'yellow', 3 => 'green', 4 => 'purple,blue'); //Adding purple and blue seperated by comma...
foreach($array as $k=>$v)
{
if(strpos($v,'purple')!==false)
{
echo $k;// "prints" 4 if you pass purple or blue !
break;
}
}
4is the key for both purple and blue.