急急急！100求问字符串问题

Question

if(strpos($longStr, "aaa")===false)
    echo "not found";
else
    echo "found";

Answer 1

人家说是很长的字符串，还是别用正则了strpos不行吗？

Answer 2

strstr也行，效率比strpos低点。

Answer 3

strstr($string,$searchString)或strpos($string,$searchString)都可以

Answer 4

Filter(InputStrings, Value[, Include[, Compare]])

Answer 5

if(strpos($longStr, "aaa")===false)
    echo "not found";
else
    echo "found";