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Arrays
array
- Create an array
array_change_key_case
- Changes the case of all keys in an array
array_chunk
- Split an array into chunks
array_column
- Return the values from a single column in the input array
array_combine
- Creates an array by using one array for keys and another for its values
array_count_values
- Counts all the values of an array
array_diff
- Computes the difference of arrays
array_diff_assoc
- Computes the difference of arrays with additional index check
array_diff_key
- Computes the difference of arrays using keys for comparison
array_fill
- Fill an array with values
array_fill_keys
- Fill an array with values, specifying keys
array_flip
- Exchanges all keys with their associated values in an array
array_intersect
- Computes the intersection of arrays
array_intersect_assoc
- Computes the intersection of arrays with additional index check
array_intersect_key
- Computes the intersection of arrays using keys for comparison
array_is_list
- Checks whether a given [array] is a list
array_key_exists
- Checks if the given key or index exists in the array
array_key_first
- Gets the first key of an array
array_key_last
- Gets the last key of an array
array_keys
- Return all the keys or a subset of the keys of an array
array_merge
- Merge one or more arrays
array_merge_recursive
- Merge one or more arrays recursively
array_multisort
- Sort multiple or multi-dimensional arrays
array_pad
- Pad array to the specified length with a value
array_pop
- Pop the element off the end of array
array_product
- Calculate the product of values in an array
array_push
- Push one or more elements onto the end of array
array_rand
- Pick one or more random keys out of an array
array_replace
- Replaces elements from passed arrays into the first array
array_replace_recursive
- Replaces elements from passed arrays into the first array recursively
array_reverse
- Return an array with elements in reverse order
array_search
- Searches the array for a given value and returns the first corresponding key if successful
array_shift
- Shift an element off the beginning of array
array_slice
- Extract a slice of the array
array_splice
- Remove a portion of the array and replace it with something else
array_sum
- Calculate the sum of values in an array
array_unique
- Removes duplicate values from an array
array_unshift
- Prepend one or more elements to the beginning of an array
array_values
- Return all the values of an array
arsort
- Sort an array in descending order and maintain index association
asort
- Sort an array in ascending order and maintain index association
count
- Counts all elements in an array or in a Countable object
in_array
- Checks if a value exists in an array
krsort
- Sort an array by key in descending order
ksort
- Sort an array by key in ascending order
natcasesort
- Sort an array using a case insensitive "natural order" algorithm
natsort
- Sort an array using a "natural order" algorithm
range
- Create an array containing a range of elements
rsort
- Sort an array in descending order
sort
- Sort an array in ascending order
BCMath
bcadd
- Add two arbitrary precision numbers
bccomp
- Compare two arbitrary precision numbers
bcdiv
- Divide two arbitrary precision numbers
bcmod
- Get modulus of an arbitrary precision number
bcmul
- Multiply two arbitrary precision numbers
bcpow
- Raise an arbitrary precision number to another
bcpowmod
- Raise an arbitrary precision number to another, reduced by a specified modulus
bcscale
- Set or get default scale parameter for all bc math functions
bcsqrt
- Get the square root of an arbitrary precision number
bcsub
- Subtract one arbitrary precision number from another
Calendar
cal_days_in_month
- Return the number of days in a month for a given year and calendar
cal_from_jd
- Converts from Julian Day Count to a supported calendar
cal_info
- Returns information about a particular calendar
cal_to_jd
- Converts from a supported calendar to Julian Day Count
easter_date
- Get Unix timestamp for midnight on Easter of a given year
easter_days
- Get number of days after March 21 on which Easter falls for a given year
frenchtojd
- Converts a date from the French Republican Calendar to a Julian Day Count
gregoriantojd
- Converts a Gregorian date to Julian Day Count
jddayofweek
- Returns the day of the week
jdmonthname
- Returns a month name
jdtofrench
- Converts a Julian Day Count to the French Republican Calendar
jdtogregorian
- Converts Julian Day Count to Gregorian date
jdtojewish
- Converts a Julian day count to a Jewish calendar date
jdtojulian
- Converts a Julian Day Count to a Julian Calendar Date
jdtounix
- Convert Julian Day to Unix timestamp
jewishtojd
- Converts a date in the Jewish Calendar to Julian Day Count
juliantojd
- Converts a Julian Calendar date to Julian Day Count
unixtojd
- Convert Unix timestamp to Julian Day
Cryptography and Hashing
hash
- Generate a hash value (message digest)
hash_algos
- Return a list of registered hashing algorithms
hash_equals
- Timing attack safe string comparison
hash_hkdf
- Generate a HKDF key derivation of a supplied key input
hash_hmac
- Generate a keyed hash value using the HMAC method
hash_hmac_algos
- Return a list of registered hashing algorithms suitable for hash_hmac
hash_pbkdf2
- Generate a PBKDF2 key derivation of a supplied password
random_bytes
- Generates cryptographically secure pseudo-random bytes
random_int
- Generates cryptographically secure pseudo-random integers
Custom tools
IP Address finder
- Shows your current IP address and hostname
Password Generator
- Create a secure password with this simple online tool
Date and Time
checkdate
- Validate a Gregorian date
date
- Format a local time/date
getdate
- Get date/time information
gettimeofday
- Get current time
gmdate
- Format a GMT/UTC date/time
gmmktime
- Get Unix timestamp for a GMT date
gmstrftime
- Format a GMT/UTC time/date according to locale settings
hrtime
- Get the system's high resolution time
idate
- Format a local time/date as integer
localtime
- Get the local time
microtime
- Return current Unix timestamp with microseconds
mktime
- Get Unix timestamp for a date
strftime
- Format a local time/date according to locale settings
strptime
- Parse a time/date generated with
strftime
strtotime
- Parse about any English textual datetime description into a Unix timestamp
time
- Return current Unix timestamp
Filesystem
basename
- Returns trailing name component of path
file_get_contents
- Reads entire file into a string
file_put_contents
- Write data to a file
pathinfo
- Returns information about a file path
General
hex2bin
- Decodes a hexadecimally encoded binary string
json_decode
- Decodes a JSON string
json_encode
- Returns the JSON representation of a value
pack
- Pack data into binary string
serialize
- Generates a storable representation of a value
token_name
- Get the symbolic name of a given PHP token
uniqid
- Generate a unique ID
unpack
- Unpack data from binary string
unserialize
- Creates a PHP value from a stored representation
zlib_decode
- Uncompress any raw/gzip/zlib encoded data
zlib_encode
- Compress data with the specified encoding
iconv
iconv_get_encoding
- Retrieve internal configuration variables of iconv extension
iconv_mime_decode
- Decodes a MIME header field
iconv_mime_decode_headers
- Decodes multiple MIME header fields at once
iconv_mime_encode
- Composes a MIME header field
iconv_strlen
- Returns the character count of string
iconv_strpos
- Finds position of first occurrence of a needle within a haystack
iconv_strrpos
- Finds the last occurrence of a needle within a haystack
iconv_substr
- Cut out part of a string
Language and Character Encoding
idn_to_ascii
- Convert domain name to IDNA ASCII form
idn_to_utf8
- Convert domain name from IDNA ASCII to Unicode
Math
abs
- Absolute value
acos
- Arc cosine
acosh
- Inverse hyperbolic cosine
asin
- Arc sine
asinh
- Inverse hyperbolic sine
atan
- Arc tangent
atan2
- Arc tangent of two variables
atanh
- Inverse hyperbolic tangent
base_convert
- Convert a number between arbitrary bases
bindec
- Binary to decimal
ceil
- Round fractions up
cos
- Cosine
cosh
- Hyperbolic cosine
decbin
- Decimal to binary
dechex
- Decimal to hexadecimal
decoct
- Decimal to octal
deg2rad
- Converts the number in degrees to the radian equivalent
exp
- Calculates the exponent of e
expm1
- Returns exp(number) - 1, computed in a way that is accurate even when the value of number is close to zero
fdiv
- Divides two numbers, according to IEEE 754
floor
- Round fractions down
fmod
- Returns the floating point remainder (modulo) of the division of the arguments
getrandmax
- Show largest possible random value
hexdec
- Hexadecimal to decimal
hypot
- Calculate the length of the hypotenuse of a right-angle triangle
intdiv
- Integer division
is_finite
- Finds whether a value is a legal finite number
is_infinite
- Finds whether a value is infinite
is_nan
- Finds whether a value is not a number
lcg_value
- Combined linear congruential generator
log
- Natural logarithm
log10
- Base-10 logarithm
log1p
- Returns log(1 + number), computed in a way that is accurate even when the value of number is close to zero
max
- Find highest value
min
- Find lowest value
mt_getrandmax
- Show largest possible random value
mt_rand
- Generate a random value via the Mersenne Twister Random Number Generator
mt_srand
- Seeds the Mersenne Twister Random Number Generator
octdec
- Octal to decimal
pi
- Get value of pi
pow
- Exponential expression
rad2deg
- Converts the radian number to the equivalent number in degrees
rand
- Generate a random integer
round
- Rounds a float
sin
- Sine
sinh
- Hyperbolic sine
sqrt
- Square root
srand
- Seed the random number generator
tan
- Tangent
tanh
- Hyperbolic tangent
Multibyte String
mb_check_encoding
- Check if strings are valid for the specified encoding
mb_chr
- Return character by Unicode code point value
mb_convert_case
- Perform case folding on a string
mb_convert_encoding
- Convert a string from one character encoding to another
mb_convert_kana
- Convert "kana" one from another ("zen-kaku", "han-kaku" and more)
mb_decode_mimeheader
- Decode string in MIME header field
mb_decode_numericentity
- Decode HTML numeric string reference to character
mb_detect_encoding
- Detect character encoding
mb_encode_mimeheader
- Encode string for MIME header
mb_encode_numericentity
- Encode character to HTML numeric string reference
mb_encoding_aliases
- Get aliases of a known encoding type
mb_ereg
- Regular expression match with multibyte support
mb_ereg_match
- Regular expression match for multibyte string
mb_ereg_replace
- Replace regular expression with multibyte support
mb_eregi
- Regular expression match ignoring case with multibyte support
mb_eregi_replace
- Replace regular expression with multibyte support ignoring case
mb_get_info
- Get internal settings of mbstring
mb_http_input
- Detect HTTP input character encoding
mb_http_output
- Set/Get HTTP output character encoding
mb_ord
- Get Unicode code point of character
mb_split
- Split multibyte string using regular expression
mb_str_split
- Given a multibyte string, return an array of its characters
mb_strcut
- Get part of string
mb_strimwidth
- Get truncated string with specified width
mb_stripos
- Finds position of first occurrence of a string within another, case insensitive
mb_stristr
- Finds first occurrence of a string within another, case insensitive
mb_strlen
- Get string length
mb_strpos
- Find position of first occurrence of string in a string
mb_strrchr
- Finds the last occurrence of a character in a string within another
mb_strrichr
- Finds the last occurrence of a character in a string within another, case insensitive
mb_strripos
- Finds position of last occurrence of a string within another, case insensitive
mb_strrpos
- Find position of last occurrence of a string in a string
mb_strstr
- Finds first occurrence of a string within another
mb_strtolower
- Make a string lowercase
mb_strtoupper
- Make a string uppercase
mb_strwidth
- Return width of string
mb_substr
- Get part of string
mb_substr_count
- Count the number of substring occurrences
Network
gethostbyaddr
- Get the Internet host name corresponding to a given IP address
gethostbyname
- Get the IPv4 address corresponding to a given Internet host name
gethostbynamel
- Get a list of IPv4 addresses corresponding to a given Internet host name
getmxrr
- Get MX records corresponding to a given Internet host name
getservbyname
- Get port number associated with an Internet service and protocol
getservbyport
- Get Internet service which corresponds to port and protocol
ip2long
- Converts a string containing an (IPv4) Internet Protocol dotted address into a long integer
long2ip
- Converts an long integer address into a string in (IPv4) Internet standard dotted format
Output Buffering
ob_start
- Turn on output buffering
Password Hashing
password_algos
- Get available password hashing algorithm IDs
password_get_info
- Returns information about the given hash
password_hash
- Creates a password hash
password_needs_rehash
- Checks if the given hash matches the given options
password_verify
- Verifies that a password matches a hash
Regular Expressions
preg_filter
- Perform a regular expression search and replace
preg_grep
- Return array entries that match the pattern
preg_match
- Perform a regular expression match
preg_match_all
- Perform a global regular expression match
preg_quote
- Quote regular expression characters
preg_replace
- Perform a regular expression search and replace
preg_replace_callback
- Perform a regular expression search and replace using a callback
preg_split
- Split string by a regular expression
String Manipulation
addcslashes
- Quote string with slashes in a C style
addslashes
- Quote string with slashes
bin2hex
- Convert binary data into hexadecimal representation
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
explode
- Split a string by a string
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 HTML entities to their corresponding characters
htmlentities
- Convert all applicable characters to HTML entities
htmlspecialchars
- Convert special characters to HTML entities
htmlspecialchars_decode
- Convert special HTML entities back to characters
iconv
- Convert a string from one character encoding to another
implode
- Join array elements with a string
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
- Calculate the md5 hash of a string
md5_file
- Calculates the md5 hash of a given file
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
sha1
- Calculate the sha1 hash of a string
sha1_file
- Calculate the sha1 hash of a file
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_ends_with
- Checks if a string ends with a given substring
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_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
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
strval
- Get string value of a variable
substr
- Return part of a string
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
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
vprintf
- Output a formatted string
vsprintf
- Return a formatted string
wordwrap
- Wraps a string to a given number of characters
Urls
base64_decode
- Decodes data encoded with MIME base64
base64_encode
- Encodes data with MIME base64
get_meta_tags
- Extracts all meta tag content attributes from a file and returns an array
http_build_query
- Generate URL-encoded query string
parse_url
- Parse a URL and return its components
rawurldecode
- Decode URL-encoded strings
rawurlencode
- URL-encode according to RFC 3986
urldecode
- Decodes URL-encoded string
urlencode
- URL-encodes string
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Arrays
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Calendar
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Custom tools
Date and Time
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General
iconv
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Math
Multibyte String
Network
Output Buffering
Password Hashing
Regular Expressions
String Manipulation
Urls
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