PHP String Functions PHP
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PHP String Functions
PHP String Functions
PHP provides various string functions to access and manipulate strings. A list of important PHP string functions are given below.
PHP STRING FUNTIONS
| 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 converts 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. |
| 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. |
| 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. |
| print() | It is used for output one or more strings. |
| fprint() | It is used to write a formatted string to a stream. |
| 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. |
| htmlentities() | It is used to convert character to HTML entities. |
| html_entity_decode() | It is used to convert HTML entities to characters. |
| ord() | It is used to return ASCII value of the first character of a string. |
| parse_str() | It is used to parse a query string into variables. |
| Implode() | It is used to return a string from the elements of an array. |
| Lcfirst() | It is used to convert the first character of a string to lowercase. |
| Join() | It is the Alias of implode() function. |
| Levenshtein() | It is used to return the Levenshtein distance between two strings. |
| trim() | It is used to remove whitespace. |
| ltrim() | It is used to remove whitespace from the left side of a string. |
| rtrim() | It is used to remove whitespace from the right side of a string. |
| md5() | It is used to calculate the MD5 hash of a string. |
| md5_files() | It is used to calculate MD5 hash of a file. |
| metaphone() | It is used to calculate the metaphone key of a string. |
| Soundex() | It is is used to calculate the soundex key of a string. |
| setlocale() | It is used to set locale information. |
| money_format() | It is used to return a string formatted as a currency string. |
| printf() | It is used to show output as a formatted string. |
| sha1() | It is used to return the SHA-1 hash of a string. |
| sscanf() | It is used to parse input from a string according to a format. |
| str_getcsv() | It is used to parse a CSV string into an array. |
| sha1_file() | It is used to return the SHA-1 hash of a file. |
| similar_text() | It is used to compare the similarity between two strings. |
| str_pad() | It is used to pad a string to a new length. |
| str_ireplace() | It is used to replace some characters in a string (case-insensitive). |
| str_repeat() | It is used to repeat a string a specified number of times. |
| str_rot13() | It is used to perform the ROT13 encoding on a string. |
| str_shuffle() | It is used to randomly shuffle all characters in a string. |
| str_split() | It is used to split a string into an array. |
| str_word_count() | It is used to count the number of words in a string. |
| strcasecmp() | It is used to compare two strings. |
| strchr() | It is used to find the first occurrence of a string inside another string. |
| stscroll() | It is locale based string comparison. |
| strcmp() | It is binary safe string comparison. |
| strcspn() | It is used to reverses a string. |
| strip_tags() | It is used to strip HTML and PHP tags from a string. |
| stripcslashes() | It is used to unquote a string quoted with addcslashes(). |
| stripos() | It is used to return the position of the first occurrence of a string inside another string. |
| strlen() | It is used to return the length of a string. |
| strnatcasecmp() | It is used to compare two strings using a "natural order" algorithm. |
| strnatcmp() | It is used to compare two strings using a "natural order" algorithm. |
| strncmp() | It is used to compare of the first n characters. |
| strpbrk() | It is used to search a string for any of a set of characters. |
| strpos() | It is used to return the position of the first occurrence of a string inside another string. |
| strrchr() | It is used to find the last occurrence of a string inside another string. |
| strrev() | It is used to reverse a string. |
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 strtoupper ( 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 string converting first character into 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
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