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up vote 1 down vote favorite

I have an array like the following:

 5-9-21, 
 5-10-22,
 5-10-22,
 5-11-23,
 3-17-29,
 3-19-31,
 3-19-31,
 1-25-31,
 7-30-31

I wil get a value dynamically. Then I have to compare that value with the middle part of array.

9,
10,
10,
11,
17,
19,
19,
25,
30

If it's matching then I have to remove the whole part from array. For example. If I am getting a value dynamically is 19, then I wil match with that array. And 3-19-31 is there two times. So it will remove all 3-19-31. After exploding with "-".

How can I do this?

share|improve this question
 
Is this supposed to be a 2D array or is 5-9-21 an array element? –  Havelock Sep 3 '12 at 6:47
 
5-9-21 and others are just one one element of array. –  user1638279 Sep 3 '12 at 6:51
 
thankx everyone for ur answers... –  user1638279 Sep 3 '12 at 7:21
 
You can now accept an answer if it worked for you. –  Havelock Sep 3 '12 at 7:32
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6 Answers

up vote 1 down vote accepted 
foreach($array as $key=>$value){
    $parts = explode('-', $value);
    if($parts[1] == $search) {
        unset($array[$key]);
    }
}

Or if your search is an array

foreach($array as $key=>$value){
    $parts = explode('-', $value);
    if(in_array($parts[1], $search)) {
        unset($array[$key]);
    }
}
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up vote 1 down vote

You could use array_filter to get a new array.

$new_arr = array_filter($old_arr, function($var) use ($input) {
  $ret = explode('-', $var);
  return !(isset($ret[1]) && $ret[1] === $input);
});

Or use a normal loop and then use unset to remove the values.

for ($arr as $key => $value) {
  $ret = explode('-', $value);
  if (isset($ret[1]) && $ret[1] === $input) {
    unset($arr[$key]);
  }
}
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up vote 0 down vote

use this function, this will give you all the keys which are matched:

function custom_array_search($keyword,$array){
  if(!is_array($array)){
    return false;
  }
  $ret_keys = array();
  foreach($array as $key=>$value){
    if(strpos("-{$keyword}-",$value)!==false){
      $ret_keys[] = $key;
    }
  }
  return $ret_keys;
}

This function will give you all keys in an array.

Now you can delete those i.e. unset all keys from that array. :)

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up vote 0 down vote 
<?php
$arr = array('5-9-21', '5-10-22', '5-10-22', '5-11-23', '3-17-29', '3-19-31', '3-19-31', '1-25-31', '7-30-31');
$k = '10';
#print_r($arr);
foreach ($arr as $key => $value)
{
    $t = explode('-',$value);
    if($t[1] == $k)
    {
        unset($arr[$key]);
        #echo "deleted<br>";
    }
}
#print_r($arr);
?>
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up vote 0 down vote

You can try this...

$arr; // your array
$value = 19;

foreach ($arr as $key=>$a)
{
    if(strpos($a, "-".$value."-") !== false)
        unset($arr[$key]);
}
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is the 19 after $value a typo? –  tigrang Sep 3 '12 at 6:53
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up vote 0 down vote

There are few ways you can do this. If you are going to have only one digit always in the first eliment of your triplet, the following code should work;

$triplet_array = array(5-9-21, 5-10-22, 5-10-22, 5-11-23, 3-17-29, 3-19-31, 3-19-31, 1-25-31, 7-30-31);
$i = 0;
foreach($triplet_array as triplet){
  $middle = substring($triplet,2,0);
  if($middle == $my_dynamic_value) unset($triplet_array[$i]);
  $i++
}

but, if the first part is not going to contain only one digit always;

foreach($triplet_array as triplet){
  $this_triplet = explode('-',$triplet);
  if($this_triplet[1] == $my_dynamic_value) unset($triplet_array[$i]);
  $i++
}

hope this helps :-)

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