[SOLVED] get the repeating words between 2 strings

[jjk2]

"mary had a little lamb which was not fat"

 

"bloody mary had a little freaking lamb that was fat."

 

how do i get same repeating words? the first string is subset of the second.

 

so i should just get: mary, had, a, little, lamb, was, fat

[Ken2k7]

$str1 = 'mary had a little lamb which was not fat';
$str2 = 'bloody mary had a little freaking lamb that was fat';

$words = explode(' ', $str1);
$matches = array();

foreach ($words as $word) {
     if (strpos($str2, $word) !== false) $matches[] = $word;
}

print_r($matches);

[jjk2]

is there an easier function that just does this ?

[Ken2k7]

Not that I can think of right now.

[jjk2]

now what if i want to compare multiple strings and count the number of times a keyword repeats?

 

 

 

[ignace]

Then you would have to extend Ken's code:

 

<?php
$strings = array('there is something about mary..', 'some more mary', 'and a little more.. mary');

$words = explode(' ', array_shift($strings));
$matches = array();

foreach ($words as $word) {
    foreach ($strings as $string) {
        if (strpos($string, $word) !== false) $matches[] = $word;
    }
}
?>

 

No problem to big, no problem to small for us guru's to solve ain't it Ken