- substr_count: documentation ( source)
- explode: documentation ( source)
<?php
function substr_count_array( $haystack, $needle ) {
$count = 0;
foreach ($needle as $substring) {
$count += substr_count( $haystack, $substring);
}
return $count;
}
$str = 'The fox jumped over the table and ate a frog';
$search = 'fox ate apple';
$words = explode(' ', $search);
$result = substr_count_array($str, $words);
$total_words = sizeof($words);
$relative = ($result / $total_words) * 100;
if($relative > 50)
{
echo $relative. '% related to your query (Total words: '.$total_words.', Words found: '.$result.')';
}
else
{
echo 'Could not find anything related';
}