December 7, 2012

How to remove elements from array

If you want to remove an array of  elements from another array that have a particular value(s) here’s a neat way of doing it without any looping:

// our initial array
$arr_main = array('blue', 'green', 'red', 'yellow', 'green', 'orange', 'yellow', 'indigo', 'red');

// remove the elements who's values are yellow or red
$arr_to_rem = array('red', 'yellow');

echo '
';
print_r($arr_main);
echo '

‘;

$arr_main = array_diff($arr_main, $arr_to_rem);

echo ‘

';
print_r($arr_main);
echo '

‘;

$arr_main = array_values($arr_main);
echo ‘

';
print_r($arr_main);
echo '

‘;

‘;

This is the output from the code above:

Array
(
    [0] => blue
    [1] => green
    [2] => red
    [3] => yellow
    [4] => green
    [5] => orange
    [6] => yellow
    [7] => indigo
    [8] => red
)
Array
(
    [0] => blue
    [1] => green
    [4] => green
    [5] => orange
    [7] => indigo
)
Array
(
    [0] => blue
    [1] => green
    [2] => green
    [3] => orange
    [4] => indigo
)


Enjoy!

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