9 PHP String Functions

PHP strlen () function

The strlen () function returns the length of a string, measured in characters.

    
    echo strlen("Hello world!");?>输出：12

PHP Strpos () function

The Strpos () function is used to retrieve the specified character or text within a string.

If a match is found, the first matching character position is returned. If no match is found, FALSE is returned.

    
    echo strpos("Hello world!","world");?>

The output of the above code is: 6.

Tip: The position of the string "World" in the example above is 6. The reason for 6 (instead of 7) is that the position of the first character in the string is 0 instead of 1.

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