Php compare strings and return common values

I have tried to find other posts/information on this and none of them seem to work - although I'm sure this is a simple ta开发者_Go百科sk.

I have two strings, and I would like to have some lines of code that give me the word that they have in common.

For example, I may have...

String1 = "Product Name - Blue";
String2 = "Blue Green Pink Black Orange";

And I would like to have a string only containing the value Blue. How can I do this? Thanks in advance!

You can use explode and array_intersect maybe?

Demo here & here

<?php

  function common($str1,$str2,$case_sensitive = false)
  {
    $ary1 = explode(' ',$str1);
    $ary2 = explode(' ',$str2);

    if ($case_sensitive)
    {
      $ary1 = array_map('strtolower',$ary1);
      $ary2 = array_map('strtolower',$ary2);
    }

    return implode(' ',array_intersect($ary1,$ary2));
  }

  echo common('Product Name - Blue','Blue Green Pink Black Orange');

Returns "Blue";

EDIT Updated it to include a case-insensitive version if you'd like it.

A solution would be to split your strings into two arrays of words -- using explode(), for instance :

$string1 = "Product Name - Blue";
$string2 = "Blue Green Pink Black Orange";

$arr1 = explode(' ', $string1);
$arr2 = explode(' ', $string2);

Note that explode() is a basic solution ; you might want to use something a bit more complex, like preg_split(), which allows for more specific delimiters.

And, then, to use array_intersect() on those arrays, to find out which words are present in both :

$common = array_intersect($arr1, $arr2);
var_dump($common);

Which, in this case, would give :

array
  3 => string 'Blue' (length=4)

You want to do an explode() on each list to separate them into arrays, then use array_intersect() to find the common words in both arrays.