PHP function library (overview), php function library overview

PHP function library (overview), PHP function library overview

Array function:

array_change_key_case — Returns an array whose string keys are all lowercase or uppercase
array_chunk — Split an array into multiple
array_column — Returns a specified column in the array
array_combine — Create an array with the value of one array as its key and the value of the other array as its value
array_count_values — counts the number of occurrences of all values in the array
array_diff_assoc — Computes the difference of an array with index checking
array_diff_key — Computes the difference of an array using key name comparison
array_diff_uassoc — Calculate the difference of an array using a user-provided callback function to do index checking
array_diff_ukey — Use the callback function to compare the key names to calculate the difference set of the array
array_diff — Calculate the difference of arrays
array_fill_keys — Fills an array
array_fill — fills an array
array_filter — Use callback function to filter the cells in the array
array_flip — swap keys and values in an array
array_intersect_assoc — Compute the intersection of arrays with index checking
array_intersect_key — Computes the intersection of arrays using key name comparison
array_intersect_uassoc — Calculate the intersection of arrays with index checking, use callback function to compare indexes
array_intersect_ukey — Use callback function to compare key names to calculate the intersection of arrays
array_intersect — Calculate the intersection of arrays
array_key_exists — Checks whether a given key or index exists in an array
array_keys — Returns some or all key names in the array
array_map — Apply the callback function to the cells of the given array
array_merge_recursive — Merge one or more arrays recursively
array_merge — merge one or more arrays
array_multisort — Sort multiple arrays or multidimensional arrays
array_pad — pad the array to the specified length with values
array_pop — pop the last element of the array
array_product — Calculates the product of all values in an array
array_push — push one or more elements to the end of the array (push)
array_rand — Randomly remove one or more cells from the array
array_reduce — Iteratively reduce an array to a single value using a callback function*
array_replace_recursive — Recursively replace the elements of the first array with the passed array*
array_replace — Replace the elements of the first array with the passed array *
array_reverse — Returns an array with the cells in reverse order
array_search — Search for a given value in an array, and return the corresponding key name if successful
array_shift — Move the element at the beginning of the array out of the array *
array_slice — Remove a segment from the array
array_splice — remove part of an array and replace it with other values *
array_sum — Calculates the sum of all values in an array
array_udiff_assoc — Calculate the difference set of arrays with index checking, use callback function to compare data
array_udiff_uassoc — Calculate the difference set of the array with index check, use callback function to compare the data and index
array_udiff — Use callback function to compare data to calculate the difference of arrays
array_uintersect_assoc — Calculate the intersection of arrays with index checking, use callback function to compare data
array_uintersect_uassoc — Calculate the intersection of arrays with index checking, use callback function to compare data and index
array_uintersect — Calculate the intersection of arrays and use callback functions to compare data
array_unique — Remove duplicate values from an array
array_unshift — Insert one or more cells at the beginning of the array
array_values — Returns all values in the array
array_walk_recursive — Recursively apply user functions *
array_walk — Use user-defined functions to perform callback processing on each element in the array *
array — Create a new array
arsort — sort an array in reverse order and maintain index relationships *
asort — Sort an array and maintain index relationship
compact — Create an array including variable names and their values *
count — Count the number of cells in an array or the number of attributes in an object
current — Returns the current cell in the array
each — Returns the current key/value pair in the array and moves the array pointer forward one step *
end — Point the internal pointer of the array to the last element
extract — Import variables from the array into the current symbol table *
in_array — Check whether a value exists in the array
key_exists — alias array_key_exists
key — Get the key name from the associative array
krsort — Sort the array in reverse order by key name
ksort — Sort array by key name
list — Assign the values in the array to some variables *
natcasesort — Sort an array case-insensitively using the "natural sorting" algorithm
natsort — Sort an array using the "natural sorting" algorithm *
next — Move the internal pointer in the array forward one position
pos — alias for current
prev — Rewind the internal pointer of the array one bit *
range — Create an array containing cells in the specified range
reset — Point the internal pointer of the array to the first element *
rsort — Sort the array in reverse order
shuffle — shuffle the array
sizeof — alias for count
sort — Sort an array
uasort — Sort values in an array using a user-defined comparison function and keep index associations *
uksort — Sort keys in an array using a user-defined comparison function
usort — Sort values in an array using a user-defined comparison function

-------------------------------------------------- -------------------------------------------------- ------------------------------------ -------------------------------------------------- -------------------------------------------------- ------------------------------------ String functions:

addcslashes — Escape characters in a string using backslashes in C style
addslashes — Use backslashes to quote strings *
bin2hex — Function converts a string of ASCII characters into a hexadecimal value
chop — alias for rtrim
chr — Returns the specified character *
chunk_split — Split a string into small chunks
convert_cyr_string — Convert characters from one Cyrillic character to another
convert_uudecode — Decode a uuencode-encoded string
convert_uuencode — Use uuencode to encode a string
count_chars — Returns information about the characters used in the string
crc32 — Calculates the crc32 polynomial of a string *
crypt — One-way string hash *
echo — Output one or more strings
explode — Use one string to split another string *
fprintf — Write the formatted string to the stream
get_html_translation_table — Returns the translation table using htmlspecialchars and htmlentities *
hebrev — Convert logical-Hebrew to visual-Hebrew
hebrevc — Convert logical-Hebrew to visual-Hebrew and convert newlines
hex2bin — Convert hexadecimal string to binary string
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 normal characters *
htmlspecialchars — Convert special characters to HTML entities
implode — Convert the value of a one-dimensional array into a string *
join — alias implode
lcfirst — Make the first character of a string lowercase
levenshtein — Calculate the edit distance between two strings *
localeconv — Get numeric formatting information
ltrim — remove whitespace characters (or other characters) at the beginning of a string
md5_file — Calculate the MD5 hash value of the specified file
md5 — Calculate the MD5 hash value 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 — Insert an HTML newline mark before all new lines in the string *
number_format — Format a number with thousand separators *
ord — Returns the ASCII code value of the character *
parse_str — Parse a string into multiple variables
print — output string
printf — Output formatted string
quoted_printable_decode — Convert quoted-printable string to 8-bit string
quoted_printable_encode — Convert 8-bit string to quoted-printable string
quotemeta — escape metacharacter set *
rtrim — removes whitespace characters (or other characters) at the end of a string
setlocale — Set region information
sha1_file — Calculate the sha1 hash value of a file
sha1 — Calculates the sha1 hash value of a string
similar_text — Calculate the similarity of two strings *
soundex — Calculate the soundex key of a string
sprintf — Return a formatted string
sscanf — Parse input characters according to the specified format
str_getcsv — Parse a CSV string into an array
str_ireplace — case-ignoring version of str_replace
str_pad — pad a string with another string to the specified length *
str_repeat — Repeat a string
str_replace — Substring replacement
str_rot13 — performs a ROT13 conversion on a string
str_shuffle — Randomly shuffle a string
str_split — Convert a string to an array *
str_word_count — Returns the usage of words in the string
strcasecmp — Binary safe comparison of strings (case insensitive)
strchr — alias strstr
strcmp — Binary safe string comparison *
strcoll — Locale-based string comparison *
strcspn — Get the length of the starting substring of the unmatched mask *
strip_tags — Strip HTML and PHP tags from strings *
stripcslashes — dequote a string escaped using addcslashes
stripos — Find the first occurrence of a string (case-insensitive)
stripslashes — backquote a quoted string
stristr — A case-ignoring version of the strstr function
strlen — Get the string length
strnatcasecmp — Compare strings using the "natural order" algorithm (case-insensitive)
strnatcmp — Compare strings using natural ordering algorithm
strncasecmp — Binary safe comparison of several characters at the beginning of a string (case-insensitive)
strncmp — Binary safe comparison of several characters at the beginning of a string *
strpbrk — Find any character in a string *
strpos — Find the first occurrence of a string *
strrchr — Find the last occurrence of a specified character in a string *
strrev — Reverse a string *
strripos — Calculate the position of the last occurrence of the specified string in the target string (case-insensitive)
strrpos — Calculate the position of the last occurrence of the specified string in the target string *
strspn — Calculate the length of the first substring in a string in which all characters exist in the specified character set*
strstr — Find the first occurrence of a string *
strtok — tag split string *
strtolower — Convert string to lowercase
strtoupper — Convert a string to uppercase
strtr — Convert the specified character *
substr_compare — Binary safe comparison of strings (specified length compared from offset position)
substr_count — Count the number of occurrences of a string
substr_replace — Replace a substring of a string
substr — Returns the substring of a string
trim — Remove blank characters (or other characters) at the beginning and end of the string
ucfirst — Convert the first letter of the string to uppercase
ucwords — Convert the first letter of each word in a string to uppercase *
vfprintf — Write formatted string to stream
vprintf — Output formatted string
vsprintf — Returns the formatted string
wordwrap — breaks a string into a specified number of words *

json_decode — Encode a string in JSON format
json_encode — JSON encode variables
json_last_error_msg — Returns the error string of the last json_encode() or json_decode() call
json_last_error — Returns the last error that occurred

base64_decode — Decode data encoded using MIME base64
base64_encode — Encode data using MIME base64
get_headers — Get all headers sent by the server in response to an HTTP request
get_meta_tags — Extract all meta tag content attributes from a file and return an array
http_build_query — Generate the request string after URL-encoding
parse_url — Parse a URL and return its component parts
rawurldecode — Decode an encoded URL string
rawurlencode — Encode URLs according to RFC 1738
urldecode — Decode an encoded URL string
urlencode — Encode URL string

session_abort — Discard session array changes and finish session
session_cache_expire — Returns the expiration time of the current cache
session_cache_limiter — Read/set cache limiter
session_commit — alias of session_write_close
session_decode — Decode session data
session_destroy — Destroy all data in a session
session_encode — Encode the current session data into a string
session_get_cookie_params — Get session cookie parameters
session_id — Get/set the current session ID
session_is_registered — Checks whether the variable is registered in the session
session_module_name — Get/set the session module name
session_name — Read/set session name
session_regenerate_id — Update an existing session ID with a newly generated session ID
session_register_shutdown — Close session
session_register — Register one or more global variables with the current session
session_reset — Re-initialize session array with original values
session_save_path — Read/set the save path of the current session
session_set_cookie_params — Set session cookie parameters
session_set_save_handler — Set user-defined session storage function
session_start — Start a new session or reuse an existing session
session_status — Returns the current session status
session_unregister — Unregister a global variable from the current session
session_unset — Free all session variables
session_write_close — Write session data and end session

__autoload — Attempts to load undefined class
call_user_method_array — Call a user method, passing the parameter array (deprecated)
call_user_method — Call a user method on a specific object (deprecated)
class_alias — Create an alias for a class
class_exists — Check whether the class is defined
get_called_class — The name of the "Late Static Binding" class
get_class_methods — Returns an array consisting of class method names
get_class_vars — Returns an array consisting of the default attributes of the class
get_class — Returns the class name of the object
get_declared_classes — Returns an array consisting of the names of defined classes
get_declared_interfaces — Returns an array containing all declared interfaces
get_declared_traits — Returns an array of all defined traits
get_object_vars — Returns an associative array consisting of object properties
get_parent_class — Returns the parent class name of the object or class
interface_exists — Check whether the interface has been defined
is_a — Returns TRUE if the object belongs to this class or this class is the parent class of this object
is_subclass_of — Returns TRUE if this object is a subclass of this class
method_exists — Check whether a class method exists
property_exists — Check whether an object or class has this property
trait_exists — Check whether the specified trait exists

mysql_affected_rows — Get the number of record rows affected by the previous MySQL operation
mysql_client_encoding — Returns the name of the character set
mysql_close — Close the MySQL connection
mysql_connect — Open a connection to the MySQL server
mysql_create_db — Create a new MySQL database
mysql_data_seek — Move pointer to internal result
mysql_db_name — Get result data
mysql_db_query — Send a MySQL query
mysql_drop_db — drop (delete) a MySQL database
mysql_errno — Returns the numeric code of the error message in the previous MySQL operation
mysql_error — Returns the text error message generated by the previous MySQL operation
mysql_escape_string — Escape a string for mysql_query
mysql_fetch_array — Fetch a row from the result set as an associative array, a numeric array, or both
mysql_fetch_assoc — Get a row from the result set as an associative array
mysql_fetch_field — Get column information from the result set and return it as an object
mysql_fetch_lengths — Get the length of each output in the result set
mysql_fetch_object — Get a row from the result set as an object
mysql_fetch_row — Get a row from the result set as an enumeration array
mysql_field_flags — Get the flags associated with the specified field from the result
mysql_field_len — Returns the length of the specified field
mysql_field_name — Get the field name of the specified field in the result
mysql_field_seek — Set the pointer in the result set to the specified field offset
mysql_field_table — Get the table name where the specified field is located
mysql_field_type — Get the type of the specified field in the result set
mysql_free_result — Release result memory
mysql_get_client_info — Get MySQL client information
mysql_get_host_info — Get MySQL host information
mysql_get_proto_info — Get MySQL protocol information
mysql_get_server_info — Get MySQL server information
mysql_info — Get the latest query information
mysql_insert_id — Get the ID generated by the previous INSERT operation
mysql_list_dbs — List all databases in the MySQL server
mysql_list_fields — List fields in MySQL results
mysql_list_processes — List MySQL processes
mysql_list_tables — List tables in the MySQL database
mysql_num_fields — Get the number of fields in the result set
mysql_num_rows — Get the number of rows in the result set
mysql_pconnect — Open a persistent connection to the MySQL server
mysql_ping — Ping a server connection, reconnect if there is no connection
mysql_query — Send a MySQL query
mysql_real_escape_string — Escape special characters in a string used in a SQL statement, taking into account the current character set of the connection
mysql_result — Get result data
mysql_select_db — Select MySQL database
mysql_set_charset — Set the client’s character set
mysql_stat — Get the current system status
mysql_tablename — Get the table name
mysql_thread_id — Returns the ID of the current thread
mysql_unbuffered_query — Sends a SQL query to MySQL without retrieving and caching the result rows

abs — absolute value
acos — inverse cosine
acosh — inverse hyperbolic cosine
asin — arcsine
asinh — inverse hyperbolic sine
atan2 — Arctangent of two parameters
atan — Arctangent
atanh — inverse hyperbolic tangent
base_convert — Convert numbers between any bases
bindec — Convert binary to decimal
ceil — rounding to the nearest whole
cos — cosine
cosh — hyperbolic cosine
decbin — Convert decimal to binary
dechex — Convert decimal to hexadecimal
decoct — Convert decimal to octal
deg2rad — Convert angles to radians
exp — Calculate the exponent of e
expm1 — Returns exp(number) - 1, and can calculate accurate results even when the value of number is close to zero
floor — Rounding by rounding
fmod — Returns the floating point remainder of division
getrandmax — displays the maximum possible value of a random number
hexdec — Convert hexadecimal to decimal
hypot — Calculate the length of the hypotenuse of a right triangle
intdiv — Integer division
is_finite — Determine whether it is a finite value
is_infinite — Determine whether the value is infinite
is_nan — Determine whether it is a legal value
lcg_value — Combination Linear Congruential Generator
log10 — base 10 logarithm
log1p — returns log(1 number), and can calculate accurate results even when the value of number is close to zero
log — natural logarithm
max — Find the maximum value
min — Find the minimum value
mt_getrandmax — displays the maximum possible value of a random number
mt_rand — Generate better random numbers
mt_srand — Sowing the seeds for a better random number generator
octdec — Convert octal to decimal
pi — get the pi value
pow — exponential expression
rad2deg — Convert radians to corresponding degrees
rand — Generate a random integer
round — Round floating point numbers
sin — sine
sinh — hyperbolic sine
sqrt — square root
srand — Plant a random number generator seed
tan — tangent
tanh — hyperbolic tangent

checkdate — Verify a Gregorian date
date_add — alias DateTime::add
date_create_from_format — alias DateTime::createFromFormat
date_create_immutable_from_format — alias DateTimeImmutable::createFromFormat
date_create_immutable — alias DateTimeImmutable::__construct
date_create — alias DateTime::__construct
date_date_set — alias DateTime::setDate
date_default_timezone_get — Get the default time zone used by all date and time functions in a script
date_default_timezone_set — Set the default timezone used for all datetime functions in a script
date_diff — alias DateTime::diff
date_format — alias DateTime::format
date_get_last_errors — alias DateTime::getLastErrors
date_interval_create_from_date_string — alias DateInterval::createFromDateString
date_interval_format — alias DateInterval::format
date_isodate_set — alias DateTime::setISODate
date_modify — alias DateTime::modify
date_offset_get — alias DateTime::getOffset
date_parse_from_format — Get info about given date formatted according to the specified format
date_parse — Returns associative array with detailed info about given date
date_sub — alias DateTime::sub
date_sun_info — Returns an array with information about sunset/sunrise and twilight begin/end
date_sunrise — Returns the sunrise time for a given date and location
date_sunset — Returns the sunset time for a given date and location
date_time_set — alias DateTime::setTime
date_timestamp_get — alias DateTime::getTimestamp
date_timestamp_set — alias DateTime::setTimestamp
date_timezone_get — alias DateTime::getTimezone
date_timezone_set — alias DateTime::setTimezone
date — Format a local time/date
getdate — Get date/time information
gettimeofday — Get the current time
gmdate — Format a GMT/UTC date/time
gmmktime — Get UNIX timestamp of GMT date
gmstrftime — Format GMT/UTC time/date according to locale
idate — Format local time and date into integers
localtime — Get local time
microtime — Returns the current Unix timestamp and microseconds
mktime — Get the Unix timestamp of a date
strftime — Format local time/date according to locale
strptime — parse date/time generated by strftime
strtotime — Parse any English text datetime description into a Unix timestamp
time — Returns the current Unix timestamp
timezone_abbreviations_list — alias DateTimeZone::listAbbreviations
timezone_identifiers_list — alias DateTimeZone::listIdentifiers
timezone_location_get — alias DateTimeZone::getLocation
timezone_name_from_abbr — Returns the timezone name from abbreviation
timezone_name_get — alias DateTimeZone::getName
timezone_offset_get — alias DateTimeZone::getOffset
timezone_open — alias DateTimeZone::__construct
timezone_transitions_get — alias DateTimeZone::getTransitions
timezone_version_get — Gets the version of the timezonedb

PHP function library (overview), php function library overview_PHP tutorial

PHP function library (overview), PHP function library overview