unset last item of array

Question

in this code i try to unset first and last item of $status array
to unset but the last item that i tried place thier pointer in $end
not unset what can I do for thi

Answer 1

Use explode instead of preg_split. It is faster. Then you can use array_pop and array_shift to remove an item from the end and beginning of the array. Then, use implode to put the remaining items back together again.

A better solution would be to use str_pos to find the first and last _ and use substr to copy the part inbetween. This will cause only one sting copy, instead of having to transform a string to array, modify that, and put the array together into a string. (Or don't you need to put them together? The 'I need 'os_disk' at the end confuses me).

Answer 2

With regex, you can do:

$item[$fieldneedle] = preg_replace("/^[^_]+_(.+)_[^_]+$/", "$1", $item[$fieldneedle]);

regex:

^        : begining of the string
[^_]+    : 1 or more non _ 
_        : _
(.+)     : capture 1 or more characters
_        : _
[^_]+    : 1 or more non _
$        : end of string

Answer 3

array_shift($end); //removes first
array_pop($end); //removes last

Answer 4

You can also use unset to remove last or any item with key

unset($status[0]); // removes the first item
unset($status[count($status) - 1]); // removes the last item

Answer 5

$item[$fieldneedle] = " node_os_disk_danger ";
$status = preg_split('/_/',$item[$fieldneedle]);
$status = array_slice($status, 1, -1);

Answer 6

Well, if you want the result to be a string, why bother converting to a string?

$regex = '#^[^_]*_(.*?)_[^_]*$#';
$string = preg_replace($regex, '\\1', $string);

It replaces everything up to and including the first underscore character, and everything after and including the last underscore character. Nice, easy and efficient...