php通过strpos查找字符串出现位置的方法，strpos字符串_PHP教程

<&#63;php
echo strpos("Hello world!","wo");
&#63;>

<&#63;php
$haystack = "needle23423432";
$pos = strpos($haystack, "needle");
if ($pos==false) {
 print("Not found based (==) test\n");
} else {
 print("Found based (==) test\n");
}
if ($pos===false) {
 print("Not found based (===) test\n");
} else {
 print("Found based (===) test\n");
}
&#63;>

This script will print:
 
Not found based (==) test
Found based (===) test
 
The (===) test is correct.