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PHP Manual
Function Reference
Text Processing
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Strings
Introduction
Installing/Configuring
Requirements
Installation
Runtime Configuration
Resource Types
Predefined Constants
String Functions
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
— Generate a single-byte string from a number
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 a 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
hex2bin
— Decodes a hexadecimally encoded binary string
html_entity_decode
— Convert HTML entities to their corresponding 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
— Convert the first byte of a string to a value between 0 and 255
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_contains
— Determine if a string contains a given substring
str_decrement
— Decrement an alphanumeric string
str_ends_with
— Checks if a string ends with a given substring
str_getcsv
— Parse a CSV string into an array
str_increment
— Increment an alphanumeric string
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_starts_with
— Checks if a string starts with a given substring
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 the position of the first occurrence of a case-insensitive substring in a 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 the position of the first occurrence of a substring in a string
strrchr
— Find the last occurrence of a character in a string
strrev
— Reverse a string
strripos
— Find the position of the last occurrence of a case-insensitive substring in a string
strrpos
— Find the position of the last occurrence of a substring in a string
strspn
— Finds the length of the initial segment of a string consisting entirely of characters contained within a given mask
strstr
— Find the first occurrence of a string
strtok
— Tokenize string
strtolower
— Make a string lowercase
strtoupper
— Make a string uppercase
strtr
— Translate characters or replace substrings
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
utf8_decode
— Converts a string from UTF-8 to ISO-8859-1, replacing invalid or unrepresentable characters
utf8_encode
— Converts a string from ISO-8859-1 to UTF-8
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
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