Predefined Constants
addcslashes
Strings
PHP Manual

# String Functions

# See Also

For even more powerful string handling and manipulating functions take a look at the POSIX regular expression functions and the Perl compatible regular expression functions.

## Table of Contents

- addcslashes — Quote string with slashes in a C style
- addslashes — Quote string with slashes
- bin2hex — Convert binary data into hexadecimal representation
- chop — Alias of rtrim
- chr — Return a specific character
- chunk_split — Split a string into smaller chunks
- convert_cyr_string — Convert from one Cyrillic character set to another
- convert_uudecode — Decode a uuencoded string
- convert_uuencode — Uuencode a string
- count_chars — Return information about characters used in a string
- crc32 — Calculates the crc32 polynomial of a string
- crypt — One-way string hashing
- echo — Output one or more strings
- explode — Split a string by string
- fprintf — Write a formatted string to a stream
- get_html_translation_table — Returns the translation table used by htmlspecialchars and htmlentities
- hebrev — Convert logical Hebrew text to visual text
- hebrevc — Convert logical Hebrew text to visual text with newline conversion
- html_entity_decode — Convert all HTML entities to their applicable characters
- htmlentities — Convert all applicable characters to HTML entities
- htmlspecialchars_decode — Convert special HTML entities back to characters
- htmlspecialchars — Convert special characters to HTML entities
- implode — Join array elements with a string
- join — Alias of implode
- lcfirst — Make a string's first character lowercase
- levenshtein — Calculate Levenshtein distance between two strings
- localeconv — Get numeric formatting information
- ltrim — Strip whitespace (or other characters) from the beginning of a string
- md5_file — Calculates the md5 hash of a given file
- md5 — Calculate the md5 hash of a string
- metaphone — Calculate the metaphone key of a string
- money_format — Formats a number as a currency string
- nl_langinfo — Query language and locale information
- nl2br — Inserts HTML line breaks before all newlines in a string
- number_format — Format a number with grouped thousands
- ord — Return ASCII value of character
- parse_str — Parses the string into variables
- print — Output a string
- printf — Output a formatted string
- quoted_printable_decode — Convert a quoted-printable string to an 8 bit string
- quoted_printable_encode — Convert a 8 bit string to a quoted-printable string
- quotemeta — Quote meta characters
- rtrim — Strip whitespace (or other characters) from the end of a string
- setlocale — Set locale information
- sha1_file — Calculate the sha1 hash of a file
- sha1 — Calculate the sha1 hash of a string
- similar_text — Calculate the similarity between two strings
- soundex — Calculate the soundex key of a string
- sprintf — Return a formatted string
- sscanf — Parses input from a string according to a format
- str_getcsv — Parse a CSV string into an array
- str_ireplace — Case-insensitive version of str_replace.
- str_pad — Pad a string to a certain length with another string
- str_repeat — Repeat a string
- str_replace — Replace all occurrences of the search string with the replacement string
- str_rot13 — Perform the rot13 transform on a string
- str_shuffle — Randomly shuffles a string
- str_split — Convert a string to an array
- str_word_count — Return information about words used in a string
- strcasecmp — Binary safe case-insensitive string comparison
- strchr — Alias of strstr
- strcmp — Binary safe string comparison
- strcoll — Locale based string comparison
- strcspn — Find length of initial segment not matching mask
- strip_tags — Strip HTML and PHP tags from a string
- stripcslashes — Un-quote string quoted with addcslashes
- stripos — Find position of first occurrence of a case-insensitive string
- stripslashes — Un-quotes a quoted string
- stristr — Case-insensitive strstr
- strlen — Get string length
- strnatcasecmp — Case insensitive string comparisons using a "natural order" algorithm
- strnatcmp — String comparisons using a "natural order" algorithm
- strncasecmp — Binary safe case-insensitive string comparison of the first n characters
- strncmp — Binary safe string comparison of the first n characters
- strpbrk — Search a string for any of a set of characters
- strpos — Find position of first occurrence of a string
- strrchr — Find the last occurrence of a character in a string
- strrev — Reverse a string
- strripos — Find position of last occurrence of a case-insensitive string in a string
- strrpos — Find position of last occurrence of a char in a string
- strspn — Finds the length of the first segment of a string consisting entirely of characters contained within a given mask.
- strstr — Find first occurrence of a string
- strtok — Tokenize string
- strtolower — Make a string lowercase
- strtoupper — Make a string uppercase
- strtr — Translate certain characters
- substr_compare — Binary safe comparison of two strings from an offset, up to length characters
- substr_count — Count the number of substring occurrences
- substr_replace — Replace text within a portion of a string
- substr — Return part of a string
- trim — Strip whitespace (or other characters) from the beginning and end of a string
- ucfirst — Make a string's first character uppercase
- ucwords — Uppercase the first character of each word in a string
- vfprintf — Write a formatted string to a stream
- vprintf — Output a formatted string
- vsprintf — Return a formatted string
- wordwrap — Wraps a string to a given number of characters

Predefined Constants
addcslashes
Strings
PHP Manual