How to find a value in an array and remove it by using PHP array functions

Question

How to find if a value exists in an array and then remove it  After removing I need the sequential index order   Are there any PHP built-in array functions for doing this

User · Answer

Just in case you want to use any of mentioned codes, be aware that array_search returns FALSE when the "needle" is not found in "haystack" and therefore these samples would unset the first (zero-indexed) item. Use this instead:

<?php
$haystack = Array('one', 'two', 'three');
if (($key = array_search('four', $haystack)) !== FALSE) {
  unset($haystack[$key]);
}
var_dump($haystack);

The above example will output:

Array
(
    [0] => one
    [1] => two
    [2] => three
)

And that's good!

User · Answer

To search an element in an array  you can use array search function and to remove an element from an array you can use unset function  Ex    lt  php  hackers   array   Alan Kay    Peter Norvig    Linus Trovalds    Larry Page     print r  hackers       Search  pos   array search  Linus Trovalds    hackers    echo  Linus Trovalds found at       pos      Remove from array unset  hackers  pos     print r  hackers     You can refer  https   www php net manual en ref array php for more array related functions

User · Answer

lt  php  my array   array  sheldon    leonard    howard    penny     to remove   array  howard     result   array diff  my array   to remove     gt

User · Answer

You need to find the key of the array first  this can be done using array search    Once done  use the unset     lt  php  array   array   apple    orange    pear      unset   array array search   orange    array         gt

User · Answer

This is how I would do it    terms   array  BMW    Audi    Porsche    Honda       -- purge  make  Porsche from terms -- if   empty  terms          pos            pos   array search  Porsche    terms       if   pos     false  unset  terms  pos

User · Answer

The unset array search has some pretty terrible side effects because it can accidentally strip the first element off your array regardless of the value             bad side effects          a    0 1 2 3 4 5           unset  a array search 3   a             unset  a array search 6   a              this- gt log json  a              result   1 2 4 5             what  where is 0             it was removed because false is interpreted as 0             goodness          b    0 1 2 3 4 5            b   array diff  b   3 6             this- gt log json  b              result   0 1 2 4 5   If you know that the value is guaranteed to be in the array  go for it  but I think the array diff is far safer   I m using php7

User · Answer

Okay  this is a bit longer  but does a couple of cool things   I was trying to filter a list of emails but exclude certain domains and emails   Script below will      Remove any records with a certain domain Remove any email with an exact value    First you need an array with a list of emails and then you can add certain domains or individual email accounts to exclusion lists   Then it will output a list of clean records at the end     list of domains to exclude  excluded domains   array       domain1 com         list of emails to exclude  excluded emails   array       bob domain2 com        joe domain3 com           function get domain  email          domain   explode       email        domain    domain 1       return  domain        loop through list of emails foreach  emails as  email           set false flag      exclude   false         extract the domain from the email           domain   get domain  email          check if the domain is in the exclude domains list     if in array  domain   excluded domains             exclude   true               check if the domain is in the exclude emails list     if in array  email   excluded emails             exclude   true                if its not excluded add it to the final array     if  exclude    false             clean email list      email              count    count   1     print r  clean email list

User · Answer

data arr   array  hello    developer    laravel          We Have to remove Value  quot hello quot  from the array    Check if the value is exists in the array  if  array search  hello    data arr       false                key   array search  hello    data arr               unset   data arr  key            output     It will Return unsorted Indexed array print   data arr        To Sort Array index use this  data arr   array values   data arr         Now the array key is sorted

User · Answer

First of all  as others mentioned  you will be using the  array search     amp  the  unset    methodsas shown below -   lt  php  arrayDummy   array   aaaa    bbbb    cccc    dddd    eeee    ffff    gggg     unset   arrayDummy array search   dddd    arrayDummy          Index 3 is getting unset here  print r   arrayDummy       This will show the indexes as 0  1  2  4  5  6    gt    Now to re-index the same array  without sorting any of the array values  you will need to use the  array values    method as shown below -   lt  php  arrayDummy   array values   arrayDummy    print r   arrayDummy       Now  you will see the indexes as 0  1  2  3  4  5    gt    Hope it helps

User · Answer

This solution is the combination of  Peter s solution for deleting multiple occurences and  chyno solution for removing first occurence  That s it what I m using           param array  haystack     param mixed  value     param bool  only first     return array     function array remove values array  haystack   needle   null   only first   false        if   is bool  only first     throw new Exception  The parameter  only first  must have type boolean           if  empty  haystack     return  haystack         if   only first       remove the first found value         if    pos   array search  needle   haystack       false                unset  haystack  pos                    else      remove all occurences of  needle           haystack   array diff  haystack  array  needle               return  haystack      Also have a look here  PHP array delete by value  not key

User · Answer

You can use array filter to filter out elements of an array based on a callback function  The callback function takes each element of the array as an argument and you simply return false if that element should be removed  This also has the benefit of removing duplicate values since it scans the entire array   You can use it like this    myArray   array  apple    orange    banana    plum    banana     output   array filter  myArray  function  value    return  value      banana          content of  output after previous line      output   array  apple    orange    plum      And if you want to re-index the array  you can pass the result to array values like this    output   array values  output

User · Answer

To find and remove multiple instance of value in an array  i have used the below code   list   array 1 3 4 1 3 1 5 8     new arr array     foreach  list as  value        if  value   1                 continue            else                new arr    value                 print r  new arr

[php] How to find a value in an array and remove it by using PHP array functions?

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