PHP String Functions
PHP provides various string functions to access and manipulate strings.
PHP String Functions
| addcslashes() | It is used to return a string with backslashes. |
| addslashes() | It is used to return a string with backslashes. |
| bin2hex() | It is used to convert a string of ASCII characters to hexadecimal values. |
| chop() | It removes whitespace or other characters from the right end of a string. |
| chr() | It is used to return a character from a specified ASCII value. |
| chunk_split() | It is used to split a string into a series of smaller parts. |
| chunk_split() | It is used to split a string into a series of smaller parts. |
| convert_cyr_string() | It is used to convert a string from one Cyrillic character-set to another. |
| convert_uudecode() | It is used to decode a uuencoded string. |
| convert_uuencode() | It is used to encode a string using the uuencode algorithm. |
| count_chars() | It is used to return information about characters used in a string. |
| crc32() | It is used to calculate a 32-bit CRC for a string. |
| crypt() | It is used to create hashing string One-way. |
| echo() | It is used for output one or more strings. |
| explode() | It is used to break a string into an array. |
| fprint() | It is used to write a formatted string to a stream. |
| get_html_translation_table() | Returns translation table which is used by htmlspecialchars() and htmlentities(). |
| hebrev() | It is used to convert Hebrew text to visual text. |
| hebrevc() | It is used to convert Hebrew text to visual text and new lines (n) into <br>. |
| hex2bin() | It is used to convert string of hexadecimal values to ASCII characters. |
| htmlentities() | It is used to convert character to HTML entities. |
| html_entity_decode() | It is used to convert HTML entities to characters. |
| htmlspecialchars() | Converts special characters to HTML entities. |
| htmlspecialchars_decode() | Converts HTML entities back to special characters. |
| implode() | It is used to return a string from the elements of an array. |
| join() | It is the alias of implode() function. |
| levenshtein() | It returns the Levenshtein distance between two strings. |
| lcfirst() | It converts the first character of a string to lowercase. |
| localeconv() | Gets numeric formatting information. |
| ltrim() | It removes whitespace from the left side of a string. |
| md5() | It calculates the MD5 hash of a string. |
| md5_file() | It calculates the MD5 hash of a file. |
| metaphone() | It is used to calculate the metaphone key of a string. |
| money_format() | It is used to return a string formatted as a currency string. |
| nl2br() | It is used to insert HTML line breaks in front of each newline in a string. |
| number_format() | It is used to format a number with grouped thousands. |
| ord() | It is used to return ASCII value of the first character of a string. |
| print() | It is used for outputting one or more strings. |
| printf() | It is used to show output as a formatted string. |
| quoted_printable_decode() | Converts a quoted-printable string to an 8-bit string. |
| quoted_printable_encode() | Converts the 8-bit string back to a quoted-printable string. |
| substr_replace() | Replaces part of a string with another substring. |
| trim() | Removes whitespace or other characters from the beginning and end of a string. |
| ucfirst() | Converts the first character of a string to uppercase. |
| wordwrap() | Wraps a string to a given number of characters. |
PHP String Function Examples
1) PHP strtolower() function
The strtolower() function returns string in lowercase letter.
Syntax
string strtolower ( string $string )
Example
<?php
$str="My name is KHAN";
$str=strtolower($str);
echo $str;
?>
Output
my name is khan
2) PHP strtoupper() function
The strtoupper() function returns string in uppercase letter.
Syntax
string strtolower ( string $string )
Example
<?php
$str="My name is KHAN";
$str=strtoupper($str);
echo $str;
?>
Output
MY NAME IS KHAN
3) PHP ucfirst() Function
The ucfirst() function returns a string with the first character converted to uppercase. It doesn’t change the case of other characters.
Syntax
string ucfirst ( string $str )
Example
<?php
$str = "my name is KHAN";
$str = ucfirst($str);
echo $str;
?>
Output
My name is KHAN
4) PHP lcfirst() function
The lcfirst() function returns string converting first character into lowercase. It doesn't change the case of other characters.
Syntax
string lcfirst ( string $str )
Example
<?php
$str="MY name IS KHAN";
$str=lcfirst($str);
echo $str;
?>
Output
My name is KHAN
5) PHP ucwords() function
The ucwords() function returns string converting first character of each word into uppercase.
Syntax
string ucwords ( string $str )
Example
<?php
$str="my name is Sonoo jaiswal";
$str=ucwords($str);
echo $str;
?>
Output
My Name Is Sonoo Jaiswal
6) PHP strrev() function
The strrev() function returns reversed string.
Syntax
string strrev ( string $string )
Example
<?php
$str="my name is Sonoo jaiswal";
$str=strrev($str);
echo $str;
?>
Output
lawsiaj oonoS si eman ym
7) PHP strlen() function
The strlen() function returns length of the string.
Syntax
int strlen ( string $string )
Example
<?php
$str="my name is Sonoo jaiswal";
$str=strlen($str);
echo $str;
?>
Output
24