XCVI. String functions
These functions all manipulate strings in various ways. Some more
specialized sections can be found in the regular expression and
URL handling sections.
For information on how strings behave, especially with regard to
usage of single quotes, double quotes, and escape sequences, see
the Strings entry in
the Types section of the
manual.
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
- count_chars --
Return information about characters used in a string
- crc32 -- Calculates the crc32 polynomial of a string
- crypt -- One-way string encryption (hashing)
- echo -- Output one or more strings
- explode -- Split a string by string
- get_html_translation_table --
Returns the translation table used by
htmlspecialchars() and
htmlentities()
- get_meta_tags --
Extracts all meta tag content attributes from a file and returns
an array
- hebrev --
Convert logical Hebrew text to visual text
- hebrevc --
Convert logical Hebrew text to visual text with newline conversion
- htmlentities --
Convert all applicable characters to HTML entities
- htmlspecialchars --
Convert special characters to HTML entities
- implode -- Join array elements with a string
- join -- Join array elements with a string
- levenshtein --
Calculate Levenshtein distance between two strings
- localeconv -- Get numeric formatting information
- ltrim --
Strip whitespace from the beginning of a string
- md5 -- Calculate the md5 hash of a string
- md5_file -- Calculates the md5 hash of a given filename
- metaphone -- Calculate the metaphone key of a string
- nl_langinfo --
Query language and locale information
- nl2br --
Inserts HTML line breaks before all newlines in a string
- 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
- quotemeta -- Quote meta characters
- rtrim --
Strip whitespace from the end of a string
- setlocale -- Set locale information
- 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_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
- strcasecmp --
Binary safe case-insensitive string comparison
- strchr --
Find the first occurrence of a character
- 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()
- stripslashes --
Un-quote string quoted with addslashes()
- 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
- strpos --
Find position of first occurrence of a string
- strrchr --
Find the last occurrence of a character in a string
- strrev -- Reverse a string
- strrpos --
Find position of last occurrence of a char in a string
- strspn --
Find length of initial segment matching 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 -- Return part of a string
- substr_count -- Count the number of substring occurrences
- substr_replace -- Replace text within a portion of a string
- trim --
Strip whitespace 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
- vprintf -- Output a formatted string
- vsprintf -- Return a formatted string
- wordwrap --
Wraps a string to a given number of characters using a string
break character.