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PHP Theory

Strings in PHP:

A string is a combination of characters. String is one of the data types maintained by PHP.

PHP String functions:

Strlen() function :

This function is used to find the length of a given string.

Example
<?php
echo strlen("SkillPundit"); //Output : 11
 ?>

Str_word_count() function:

This function is used to count the number of words present in a given string.

Example
<?php
echo str_word_count("Hello SkillPundit"); //Output : 2
 ?>

Strrev() function:

This function is used to reverse a given string.

Example
<?php
echo strrev("SkillPundit"); //Output : tidnuPllikS
 ?>

//Output() function:

This function is used to convert the given string characters into lower case letters.

Example
<?php
echo strtolower("SKILLPUNDIT"); //Output : skillpundit
 ?>

Strtoupper() function:

This function is used to convert the given string characters into upper case letters.

Example
<?php
echo strtoupper("skillpundit"); //Output : SKILLPUNDIT
 ?>
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