How to get specific array element?

Say I have the f开发者_JAVA技巧ollowing array of strings:

$data_array = array("the dog is hairy", "cats like treats", "my mouse is tired");

I want to write a function that will extract an element from the array based on whether it contains another string.

For example, if the array element contains the string "dog" i want to return the string "the dog is hairy" for use elsewhere.

I tried using a foreach loop but it didn't work:

foreach ($data_array as $sentence){
    if (stripos($sentence, "dog")){
        echo $sentence;
    }
}

What is the best way to go about this?

---

If you want to use stripos this is the code:

   $data_array = array("the dog is hairy", "cats like treats", "my mouse is tired");
   foreach($data_array as $value)
   {
      if (stripos($value, 'dog') !== FALSE)
         echo $value;
   }

---

It works fine for me.

http://sandbox.phpcode.eu/g/064bf

<?php 
$data_array = array("the dog is hairy", "cats like treats", "my mouse is tired"); 
foreach($data_array as $data){ 
    if (false !== stripos($data, "dog")){ 
        echo $data; 
    } 
}

---

foreach ($data_array as $val) {
  if (strstr($val, 'dog')) {
    echo $val;
  }
}

---

You can use this example:

$f_array = preg_grep('/dog/i', $data_array);  

---

You could also use preg_grep():

$found_array = preg_grep( '/dog/i', $data_array );

Edit: Added /i switch for case-insensitive matching.