The
strlen() function
The strlen() function is used to
return the length of a string.
Let's find the length of a string:
<?php
echo strlen("Hello world!");
?>
echo strlen("Hello world!");
?>
The output of the code above will
be:
12
The length of a string is often used
in loops or other functions, when it is important to know when the string ends.
(i.e. in a loop, we would want to stop the loop after the last character in the
string).
The
strpos() function
The strpos() function is used to
search for a character/text within a string.
If a match is found, this function
will return the character position of the first match. If no match is found, it
will return FALSE.
Let's see if we can find the string
"world" in our string:
<?php
echo strpos("Hello world!","world");
?>
echo strpos("Hello world!","world");
?>
The output of the code above will
be:
6
The position of the string
"world" in the example above is 6. The reason that it is 6 (and not
7), is that the first character position in the string is 0, and not 1.
