Description
String is a
collection of characters.In this chapter, string functions and their usage to manipulate strings is discussed.
Description
Some of the PHP string functions will be discussed below:
- strlen();
- strrev();
- str_replace();
- strpos();
- str_word_count();
Description
strlen() PHP function is used to find the string length.
Program
Description
Example
[php]
<!DOCTYPE html>
<html>
<body>
<?php echo strlen("SP Lessons"); ?>
</body>
</html>
[/php]
Output:
Description
strrev() PHP function is used to reverse the string.
[php]
<!DOCTYPE html>
<html>
<body>
<?php echo strrev("SP Lessons"); ?>
</body>
</html>
[/php]
Output:
Program
Description
[php]
<!DOCTYPE html>
<html>
<body>
<?php
echo str_replace("Lessons", "Programming", "SP Lessons");
?>
</body>
</html>
[/php]
Output:
In the above program, Lessons is replaced with Programming in the string SP Lessons.
Description
strpos() PHP function is used to find the specific text within a string.
If the function matches then the function returns the first character position of the text in the string. If the text didn’t match then the function returns false.
[php]
<!DOCTYPE html>
<html>
<body>
<?php echo strpos("SP Lessons", "Lessons"); ?>
</body>
</html>
[/php]
Output:
Description
str_word_count(); PHP function is used to count the number of words in a string.
[php]
<!DOCTYPE html>
<html>
<body>
<?php echo str_word_count("Welcome to the SP Lessons"); ?>
</body>
</html>
[/php]
Output:
Key Points
- String is a collection of characters.
- strrev() PHP function is used to reverse the PHP strings.
- strpos() PHP function is used to find the specific text within a string.