Remove array elements based on value supplied

Question

If I had an array like this...

array('1','2','3','4','10')

... how could I remove elements before the element whose value I supply.

For example:

If I supplied 1 then array = (1,2,3,4,10)

If it were 2 then array = (2,3,4,10) //Remove the numbers before 2

If it were 3 then array = (3,4,10) //Remove the numbers before 3

If it were 4 then array = (4,10) //Remove the numbers before 4

If it were 10 then array = (10) //Remove all before the 10

I'm currently thinking of doing with using if else. But is there a way to do this using some kind of php array function itself.

If an enumerative array, use array_search() to find the element key, and then use array_splice() — Mark Baker
– Mark Baker, Commented Jan 24, 2014 at 8:05
@MarkBaker My array is just like the one in my question. $array = array("1","2","3","4","10") — Norman
– Norman, Commented Jan 24, 2014 at 8:09

Community · Accepted Answer · 2023-11-17 19:55:19Z

1

Make use of array_search and array_slice

<?php
$arr=array_slice($arr, array_search('4',array('1','2','3','4','10')));
print_r($arr);

OUTPUT :

Array
(
    [0] => 4
    [1] => 10
)

Demo

edited Nov 17, 2023 at 19:55

CommunityBot

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answered Jan 24, 2014 at 8:10

Shankar Narayana Damodaran

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Comments

Andreea · Accepted Answer · 2014-01-24 08:12:19Z

1

Maybe this would help:

 $myArray = array('1','2','3','4','10');
 $x=3;
 $myArray = array_splice($myArray, array_search($x, $myArray), count($myArray));

answered Jan 24, 2014 at 8:12

Andreea

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Comments

Mark Baker · Accepted Answer · 2014-01-24 11:50:13Z

1

$myArray = array('1','2','3','4','10');
$value = 3;

$key = array_search($value, $myArray);
$myNewArray = array_splice($myArray, 0, $key);

edited Jan 24, 2014 at 11:50

answered Jan 24, 2014 at 8:10

Mark Baker

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3 Comments

Norman Over a year ago

You've got several things mixed up in your answer. Eg: $myArray and $value in the 3rd line and the offset in the fourth line.

Norman Over a year ago

And your final output are the number before the supplied number, while it should have been the ones after it.

Mark Baker Over a year ago

Hmmmm, I execute it with $value=3 and I get a $myArray value of [3,4,10] and $myNewArray value of [1,2] which I thought was your expectation... you can discard $myNewArray if you want and simply use array_splice($myArray, 0, $key); to update $myArray

Antonio E. · Accepted Answer · 2014-01-24 08:16:59Z

0

$array = array_filter($array, function($item) use ($filterItem) {
    return $item !== $filterItem;
});

Will filter out every item equal to $filterItem. array_filter on php.net

answered Jan 24, 2014 at 8:16

Antonio E.

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