PHP Common functions

Array functions
Array_chunk//Splitting an array into multiple arrays
Array_key_exists//Check whether the given key name or index exists in the array
Array_keys//Returns all the key names in the array and forms a new array
Array_merge//merge one or more arrays to rebuild the index
Array_values//Returns all values in the array, forming a new Array (numeric index)
Array//Create a new array
Arsort//reverse-order arrays and maintain index relationships
Asort//sorting arrays and maintaining index relationships
Count//counts the number of cells in an array or the number of attributes in an object
Each//returns the current key/value in the array and moves the array pointer one step forward
End//To point the inner pointer of the array to the last cell
Extract//Import a variable from an array into the current symbol table (whose key name is the name of the variable, and the key value as the value of the variable)
In_array//Check if a value exists in the array
Key//Get the keys from the associative array
Krsort//array reverse order by key name
Ksort//array sorted by key name
List//Assign the values in the array to some variables,
Next//Move the inner pointer in the array forward one
Current//Returns an array of cells
Reset//To point the inner pointer of the array to the first cell
Sort//Array sorting---sort_regular-normal comparison unit (does not change type), Sort_numeric-unit is compared as a number, the unit is compared as a string, and the cell is compared as a string based on the current locale setting.
Number of time and date lines


Date
Gmdate
Gmmktime
Microtime
Time

File system functions
BaseName
chmod
Copy
Delete/unlink
DirName
Fopen/flock/fread/fwrite/fclose
File_exists
File_get_contents
File_put_contents
File
Fileatime
Filemtime
FileSize
Ftruncate
Is_dir
Is_file
Is_readable
Is_uploaded_file
Is_writable
Mkdir
Move_uploaded_file
Rename
RmDir
Touch
Unlink

Mathematical functions
Abs
Ceil
Floor
Max
Min


MySQL function
Mysql_connect/mysql_pconnect
Mysql_error
Mysql_errno
Mysql_fetch_array
Mysql_fetch_field
Mysql_fetch_row
mysql_insert_id
Mysql_query

String handling functions
Addslashes
Echo
Explode
Join
Md5
Print
sprintf
Str_replace
Strstr
Strip_tags
Stripslashes
Strlen
Strpos
Strtolower
Strtouper
Substr
Trim

URL function library
Base64_decode
Base64_encode
Rawurldecode
Rawurlencode
UrlDecode
UrlEncode

Variable function
Empty
Floatval
Get_defined_vars
GetType
Intval
Is_array
Is_bool
Is_float
Is_int
Is_null
Is_numeric
Is_object
Is_resource
Is_string
Isset
Print_r
Settype
Strval
unset
Var_dump

Ini
Short_open_tag on
Asp_tags off
Disable_functions
Display_errors on
Track_errors on
Register_globals off
Post_max_size
Extension_dir = "./ext"
ENABLE_DL off

Extension=php_gd2.dll
Extension=php_mbstring.dll
Extension=php_mysql.dll

