php中的strpos没有返回值
echo strpos("jjjj333","jf");没有返回false啊是怎么回事？

[解决办法]
var_dump( strpos("jjjj333","jf")); //这样才行
[解决办法]

PHP code

if(strpos('jjjj333','jf') === false){    echo "failed";}else{    echo "success";}