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PHP
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SuperGlobals
Accessing Global Variables
Retrieving Form Data
Uploading File
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Cookies
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Clients IP Address Location
Variable Functions
Identity Booleans
Typing
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Array Functions
Searching and Counting
New Formation
Elements Conversion
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Symbols Table
Iteration and Selection
Difference and Intersection
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Date Functions
Creation and Setting
Date Formatting
Interval
Timezone
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Timestamp
Sun Motion
String Functions
ASCII Code
Reordering
Space Removal and Wrapping
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Counting
Group Searching
Splitting and Joining
Comparison
Searching
Substring
Replacement
Display and Formatting
HTML
Special Calculations
Math Functions
Trigonometry
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Filter
Filter Synopsis
Filter Examples
Checking Filters
External Data
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Basics
Splitting
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Replacement
Error Functions
Backtrace
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Error Handler
Error Generation
File System Functions
Directory
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Reading Writing
Mail Functions
Simple Mail
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JSON Functions
Encoding
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Error Handling
Cryptography Functions
Password Hashing
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ZIP Compression Functions
Adding Files
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Image Processing Functions
File Conversion
Resizing
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Watermarking
Translucent Watermarking
Adding Text
Grayscaling
Drawing
Program Execution Functions
With Output Displayed
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Network Functions
IP Address
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HTTP Header
URL
Socket Functions
Initialization
Connecting
Reading
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Information
Chat App with Web Socket
Miscellaneous Functions
PHP Options
Connection and Browser
Formatting
Sleep and Halt
More String
Excluded Information
Rar Compression
PDF
Streams
FTP and HTTP
BC Math
Tokenizer
Predefined Interfaces and Classes
AJAX
Synopsis
Retrieving a Static File
Synchronous Transfer POST
Asynchronous Transfer GET
Upload Progress and FormData
PHP New Features
Constant Scalar Expressions
Variadic Functions
Argument Unpacking
Exponentiation
use function and use const
hash_equals
debuginfo
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SuperGlobals
Superglobals are built-in arrays that are available in all scopes. They can be accessed in functions without having to do
global $variable
first. You should study
this section
carefully for it contains many crucial PHP concepts.