硕夏网html在线编辑器

<?php $str = "This is nice"; echo strlen($str)."<br>"; // Using strlen() to return the string length echo substr_count($str,"is")."<br>"; // The number of times "is" occurs in the string echo substr_count($str,"is",2)."<br>"; // The string is now reduced to "is is PHP"<br>echo substr_count($str,"is",3)."<br>"; // The string is now reduced to "s is PHP"<br>echo substr_count($str,"is",3,3)."<br>"; // The string is now reduced to "s i"<br>?>