字符串函数学习三

$str = 'abcdef';
echo strlen($str); // 6

$str = ' ab cd ';
echo strlen($str); // 7Copy

$str="wo hai shi \cong qian";
echo stripslashes($str);Copy

echo stripos("You love php, I love php too!","PHP"); //9Copy

echo strip_tags("hello <b style='color:red'>shao nian</b>");Copy

echo strip_tags("hello <p><b style='color:red'>shao nian</b></p>","<b>");Copy

echo sha1('123456');Copy

echo sha1('123456');Copy

echo rtrim(' 123 ');// 123
echo rtrim(' 123dd','d'); // 123Copy

$bar = 'HELLO WORLD!';
$bar = lcfirst($bar);             // hELLO WORLD!
$bar = lcfirst(strtoupper($bar)); // hELLO WORLD!Copy

$arr=array(33,44,55);
$str=join(',',$arr);
echo $str;Copy

var_dump(implode('hello', array()));Copy