PHP String Functions Reference Guide

addcslashes()

Returns a string with backslashes in front of the specified characters

addslashes()

Returns a string with backslashes in front of predefined characters

bin2hex()

Converts a string of ASCII characters to hexadecimal values

chop()

Removes whitespace or other characters from the right end of a string

chr()

Returns a character from a specified ASCII value

chunk_split()

Splits a string into a series of smaller parts

convert_cyr_string()

Converts a string from one Cyrillic character-set to another

convert_uudecode()

Decodes a uuencoded string

convert_uuencode()

Encodes a string using the uuencode algorithm

count_chars()

Returns information about characters used in a string

crc32()

Calculates a 32-bit CRC for a string

crypt()

One-way string hashing

echo()

Outputs one or more strings

explode()

Breaks a string into an array

fprintf()

Writes a formatted string to a specified output stream

get_html_translation_table()

Returns the translation table used by htmlspecialchars() and htmlentities()

hebrev()

Converts Hebrew text to visual text

hebrevc()

Converts Hebrew text to visual text and new lines (\n) into

hex2bin()

Converts a string of hexadecimal values to ASCII characters

html_entity_decode()

Converts HTML entities to characters

htmlentities()

Converts characters to HTML entities

htmlspecialchars_decode()

Converts some predefined HTML entities to characters

htmlspecialchars()

Converts some predefined characters to HTML entities

implode()

Returns a string from the elements of an array

join()

Alias of implode()

lcfirst()

Converts the first character of a string to lowercase

levenshtein()

Returns the Levenshtein distance between two strings

localeconv()

Returns locale numeric and monetary formatting information

ltrim()

Removes whitespace or other characters from the left side of a string

md5()

Calculates the MD5 hash of a string

md5_file()

Calculates the MD5 hash of a file

metaphone()

Calculates the metaphone key of a string

money_format()

Returns a string formatted as a currency string

nl_langinfo()

Returns specific local information

nl2br()

Inserts HTML line breaks in front of each newline in a string

number_format()

Formats a number with grouped thousands

ord()

Returns the ASCII value of the first character of a string

parse_str()

Parses a query string into variables

print()

Outputs one or more strings

printf()

Outputs a formatted string

quoted_printable_decode()

Converts a quoted-printable string to an 8-bit string

quoted_printable_encode()

Converts an 8-bit string to a quoted printable string

quotemeta()

Quotes meta characters

rtrim()

Removes whitespace or other characters from the right side of a string

setlocale()

Sets locale information

sha1()

Calculates the SHA-1 hash of a string

sha1_file()

Calculates the SHA-1 hash of a file

similar_text()

Calculates the similarity between two strings

soundex()

Calculates the soundex key of a string

sprintf()

Writes a formatted string to a variable

sscanf()

Parses input from a string according to a format

str_getcsv()

Parses a CSV string into an array

str_ireplace()

Replaces some characters in a string (case-insensitive)

str_pad()

Pads a string to a new length

str_repeat()

Repeats a string a specified number of times

str_replace()

Replaces some characters in a string (case-sensitive)

str_rot13()

Performs the ROT13 encoding on a string

str_shuffle()

Randomly shuffles all characters in a string

str_split()

Splits a string into an array

str_word_count()

Count the number of words in a string

strcasecmp()

Compares two strings (case-insensitive)

strchr()

Finds the first occurrence of a string inside another string (alias of strstr())

strcmp()

Compares two strings (case-sensitive)

strcoll()

Compares two strings (locale based string comparison)

strcspn()

Returns the number of characters found in a string before any part of some specified characters are found

strip_tags()

Strips HTML and PHP tags from a string

stripcslashes()

Unquotes a string quoted with addcslashes()

stripslashes()

Unquotes a string quoted with addslashes()

stripos()

Returns the position of the first occurrence of a string inside another string (case-insensitive)

stristr()

Finds the first occurrence of a string inside another string (case-insensitive)