PHP string functions 1. substr() · 2. strlen() · 3. str_replace() · 4. trim() · 5. strpos() · 6. strtolower() · 7. strtoupper() · 8. is_string() Through this tutorial, we will learn the most useful PHP string functions 1. substr() · 2. strlen() · 3. str_replace() · 4. trim() · 5. strpos() · 6. strtolower() · 7. strtoupper() · 8. is_string(). If you work with php or any php framework at that time need to require basic PHP functions.
The Top 10+ Most Popular PHP String Functions
PHP has several built-in string functions. top 10+ string function in PHP :
- Trim funcition
- Ucfirst function
- Ucwords function
- Strlen function
- Strtolower function
- Strtoupper function
- Lcfirst function
- Str Replace function
- Str Word Count function
- Strrev function
- Strpos function
- Substr function
- Implode function
PHP Trim Function
Trim function is used to removing whitespace both side of sting.
<?php
$str = " Developers! ";
echo trim($str);
?>
PHP Ucfirst Function
Ucfirst string function is used to change to sting the first word to uppercase.
<?php
echo ucfirst("hello world!");
?>
//Output
Hello world!
PHP Ucwords Function
This is used to change string each word first charactor to uppercase.
<?php
echo ucwords("hello developers");
?>
//Output
Hello Developers
PHP Strlen Function
Strlen function is used to count length of string.
<?php
echo strlen("developer");
?>
//Output
9
PHP Strtolower Function
Strtolower function is used to change lowercase of each charactor (whole string) of sting.
<?php
echo strtolower("DEVELOPER");
?>
//Output
developer
PHP Strtoupper Function
This function is used to convert uppercase of each charactor ( whole string ) of string.
<?php
echo strtoupper("testing");
?>
//Output
TESTING
PHP Lcfirst Function
This is used to make the first charactor of string to lowercase.
<?php
echo lcfirst("FINAL");
?>
//output
fINAL
PHP Str Replace Function
str_replace function is used to replace the value
<?php
echo str_replace("program","developer","Hello program!");
?>
// output
Hello developer
PHP Str Word Count Function
Str to word function is used to count the number of words in string.
<?php
echo str_word_count("Hello first my name is developer");
?>
// output
6
PHP Strrev Function
Strrev function is used to reversing the string. Use it for reversed to sting.
<?php
echo strrev("Hello");
?>
// output
olleh
PHP Strpos Function
Strpos function is used to find the text in string . If it find the text in string return true or false.
<?php
echo strpos("Welcome to india","india");
?>
// output
11
PHP Substr Function
Substr function is used to show(display) exact words in string.
<?php
echo substr("Hello my name is developer",0,5);
?>
//Output
Hello
PHP Implode() Function
This function is change array to string :
<?php
$arr = array('Hello','Developers!');
echo implode(" ",$arr);
?>
//Output
Hello Developers
In this php string functions tutorial, we have learned the common useful PHP string functions.
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