remove an item from and array entirely

scrupul0us

how do you remove an item from an array... i feel like such a newb

two examples:

array("red","green","blue")

array("color0"=>"red", "color1"=>"green", "color2"=>"blue");

how would i completely remove both occurances of green from the array by only knowing:

in the first case "green"

in the second case "color1"

thanks

halojoy

<?php

$arr1 = array("red","green","blue");
$arr2 = array("color0"=>"red", "color1"=>"green", "color2"=>"blue");
$arr3 = array_merge($arr1, $arr2);

foreach( $arr1 AS $key=>$val ){
     if( $val == 'green' )  unset( $arr1[$key] );
}
foreach( $arr2 AS $key=>$val ){
     if( $val == 'green' )  unset( $arr2[$key] );
}
foreach( $arr3 AS $key=>$val ){
     if( $val == 'green' )  unset( $arr3[$key] );
}

echo '<pre>'.print_r($arr1, true).'</pre>';
echo '<pre>'.print_r($arr2, true).'</pre>';
echo '<pre>'.print_r($arr3, true).'</pre>';

?>

scrupul0us

awesome.. the same either way

thanks man 🙂... you'd think after 7 years i'd remember some of this stuff

halojoy

scrupul0us wrote:
awesome.. the same either way

thanks man 🙂... you'd think after 7 years i'd remember some of this stuff

When you do not regular write code, or only use some stuff very seldom,
you forget the functions and the syntax.
Does the limiter character come before or after the string in: $arr = explode( $arg1, $arg2 );
Some stuff I know by heart now, but other things I have to look up in the PHP Manual.

When comes to working with arrays
there isnt much you can not do with [man]foreach[/man]

It is sort THE PHP CORE of working with arrays.
Access most every array key or value easy, when used in this way:

<?php

foreach( $arrayname AS $key => $value ){

// do whatever!

}

?>

Weedpacket

The first case be handled by

array_diff($array, array('green'));

And the second by

unset($array['color1']);