PHP string search to find the last occurrence of a character

$str = 'http://bbs.it-home.org phper,php learning_php technology_php website construction_php programmers focus on php technology research and learning_characters appear Times';
echo substr_count($str,'php').'';
echo substr_count($str,'h').'';
echo substr_count($ str,'php programmer');
?>

Output results: 5 3 1 Related links:

• php string search function (strrpos and strchr)
• php string search function strstr(), strrchr() examples