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Count the number of times "world" occurs in the string:
<?php echo substr_count("Hello world. The world is nice","world"); ?>
The substr_count() function counts the number of times a substring occurs in a string.
Note: The substring is case-sensitive.
Note: This function does not count overlapped substrings (see example 2).
Note: This function generates a warning if the start parameter plus the length parameter is greater than the string length (see example 3).
<?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 nice" echo substr_count($str,"is",3)."<br>"; // The string is now reduced to "s is nice" echo substr_count($str,"is",3,3)."<br>"; // The string is now reduced to "s i" ?>