<?php
$employee = array();
$employee [] = array("name" =>"Chris Apple", "company" => "Acme inc.", "title" => "Developer", "salary" => "77000");
$employee [] = array("name" =>"Todd Orange", "company" => "Daves Dogs", "title" => "Mgr", "salary" => "177000");
$employee [] = array("name" =>"Gordon Banana", "company" => "Acme inc.", "title" => "Mgr", "salary" => "277000");
$employee [] = array("name" =>"Kim Pear", "company" => "XYZ Signs", "title" => "sales", "salary" => "77000");
$employee [] = array("name" =>"Steve Cherry", "company" => "self", "title" => "handyman", "salary" => "27000");
$employee [] = array("name" =>"Jay Pineapple", "company" => "Acme inc.", "title" => "sales", "salary" => "47000");

$filtered = filter_array($employee, 'company', 'Acme inc.');
echo "<pre>";
echo "original array<br>".print_r($employee,true)."<br>";
echo "new array<br>".print_r($filtered,true)."<br>";
echo "</pre>";

//hack unless a better way is possible
function filter_array($hackstack, $fieldname, $needle)
{
    $newarray = array();
    foreach($hackstack as $key=>$subarray)
    {
        if($subarray[$fieldname]==$needle)
        {
            $newarray[] = $subarray;
        }
    }
    return($newarray);
}

$employee = array();
$employee [] = array("name" =>"Chris Apple", "company" => "Acme inc.", "title" => "Developer", "salary" => "77000");
$employee [] = array("name" =>"Todd Orange", "company" => "Daves Dogs", "title" => "Mgr", "salary" => "177000");
$employee [] = array("name" =>"Gordon Banana", "company" => "Acme inc.", "title" => "Mgr", "salary" => "277000");
$employee [] = array("name" =>"Kim Pear", "company" => "XYZ Signs", "title" => "sales", "salary" => "77000");
$employee [] = array("name" =>"Steve Cherry", "company" => "self", "title" => "handyman", "salary" => "27000");
$employee [] = array("name" =>"Jay Pineapple", "company" => "Acme inc.", "title" => "sales", "salary" => "47000");
 
// in_array usage
foreach($employee as $record)
{
  $flag = in_array("Acme.inc", $record);
  // here $flag is true if the string is in one of the inner arrays of the $employee array
  // note that because we are comparing to a string, the in_array function comparison is case sensitive
  // there is a third optional (boolean) parameter that can be passed into the in_array method
  // and if set to true this causes the comparison to be strict (ie === rather than ==) but default is false
  echo "Acme.inc in record = $flag";
}
 
// array_search usage
foreach($employee as $record)
{
  $key = array_search("Acme.inc", $record);
  // here $key is equal to the first key (index) of the record that contains the string "Acme.inc"
  // in this example, for the first record, the $key will equal "company" as it will for the third and sixth records
  // it will be identical (===) to false for the other records, so if we want to do something with this $key we need to check
  // again the string is case sensitive, and a third parameter allows you to set strict comparisons
  if($key === false)
    echo "Record not found.";
  else
    echo "Record with key = $key has acme string.";
}