Welcome to PHP Pass - Your Gateway to PHP Coding

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Basics

Introduction

PHP is a server-side scripting language for dynamic web development.

Installation

PHP installation sets up version 8.3 with Apache or Nginx servers.

Running Code

PHP scripts run via CLI or web server, using php -S for testing.

Syntax

PHP syntax uses tags and semicolons, avoiding deprecated short tags.

Variables

PHP variables use dynamic typing, with global and local scope.

Data Types

PHP data types include integers, strings, and arrays, with type juggling.

Numbers

PHP numbers include integers and floats, with is_numeric() checks.

Strings

PHP strings support concatenation and heredoc for interpolation.

Booleans

PHP booleans use logical operators, with truthy/falsy evaluations.

Type Conversion

PHP type conversion uses casting or settype() for data types.

Operators

PHP operators include arithmetic and logical, with precedence rules.

Ternary Operator

PHP ternary and ?? operators simplify conditionals and null checks.

Nullsafe Operator

PHP nullsafe operator (?->) safely accesses properties, introduced in PHP 8.0.

If Else

PHP if-else statements control flow, referencing ternary operators.

Switch

PHP switch statements handle multiple cases, with default case.

While Loops

PHP while loops iterate with break/continue for flow control.

For Loops

PHP for loops iterate arrays, including foreach for associative arrays.

Arrays

PHP arrays use indexed or associative formats, with array() or [].

Functions

PHP functions use parameters and return types for reusable code.

Arguments

PHP arguments include defaults and named arguments, added in PHP 8.0.

Scope

PHP scope includes global and static, using the global keyword.

Errors

PHP errors use try-catch with Error class for robust handling.

Debugging

PHP debugging uses var_dump and xdebug for error tracking.

Classes

PHP classes define objects with properties and visibility modifiers.

Inheritance

PHP inheritance uses extends, with final to prevent overriding.

Interfaces

PHP interfaces define contracts, supporting multiple implementations.

Traits

PHP traits enable code reuse, with conflict resolution strategies.

Anonymous Classes

PHP anonymous classes create one-off objects, introduced in PHP 7.0.

Attributes

PHP attributes use #[Attribute] for metadata, added in PHP 8.0.

Security Basics

PHP security prevents XSS and SQL injection, using htmlspecialchars().

Best Practices

PHP best practices follow PSR-12 for clean, maintainable code.

Echo / Print

PHP echo and print output data, with echo being more common.

Constants

PHP constants use define() or const for immutable values.

Magic Constants

PHP magic constants like __LINE__ provide runtime context.

Callback Functions

PHP callback functions use callable types for dynamic execution.

Include

PHP include and require load external files for modularity.

Array Creation

PHP arrays are created with array() or [], using spread in PHP 7.4.

Array Functions

PHP array functions like array_map manipulate data efficiently.

Array Sorting

PHP array sorting uses sort and asort, with multisort options.

Array Iteration

PHP array iteration uses foreach and ArrayIterator for flexibility.

String Functions

PHP string functions like strlen process text data.

String Formatting

PHP string formatting uses sprintf for precise output control.

Regular Expressions

PHP regular expressions use preg_match for pattern matching.

Form Handling

PHP form handling processes GET and POST with $_REQUEST.

Form Validation

PHP form validation ensures required fields using filter_var().

Form Security

PHP form security prevents XSS and CSRF with tokens.

Sessions

PHP sessions use session_start, with session_regenerate_id for security.

Cookies

PHP cookies use setcookie, with SameSite for security.

Session Security

PHP session security uses strict mode to prevent hijacking.

File Reading

PHP file reading uses file_get_contents for text data.

File Writing

PHP file writing uses file_put_contents with various modes.

File Uploads

PHP file uploads use $_FILES, with size and type validation.

File System

PHP file system operations include mkdir and unlink functions.

MySQLi Connect

PHP MySQLi connects to databases, using prepared statements.

MySQLi Queries

PHP MySQLi queries execute SELECT and INSERT with multi_query.

PDO Connect

PHP PDO connects to databases, using DSN for flexibility.

PDO Queries

PHP PDO queries use prepared statements with fetch modes.

Database Security

PHP database security prevents SQL injection with parameterized queries.

MySQL Create DB

PHP MySQL creates databases with CREATE DATABASE statements.

MySQL Create Table

PHP MySQL creates tables with CREATE TABLE statements.

MySQL Get Last ID

PHP MySQL retrieves the last inserted ID with insert_id.

MySQL Insert Multiple

PHP MySQL inserts multiple rows with a single query.

MySQL Where

PHP MySQL WHERE clauses filter query results dynamically.

MySQL Order By

PHP MySQL ORDER BY clauses sort query results.

MySQL Delete Data

PHP MySQL DELETE queries remove database records.

MySQL Update Data

PHP MySQL UPDATE queries modify database records.

MySQL Limit Data

PHP MySQL LIMIT clauses restrict query result rows.

date Functions

PHP date functions format dates, with DateTime class support.

math Functions

PHP math functions like abs perform calculations.

json Functions

PHP json functions encode data, with JSON_THROW_ON_ERROR.

curl Functions

PHP curl functions make HTTP requests with curl_setopt().

filter Functions

PHP filter functions validate data, like FILTER_VALIDATE_EMAIL.

hash Functions

PHP hash functions secure data with password_hash.

mbstring Functions

PHP mbstring functions handle UTF-8 with mb_strlen.

openssl Functions

PHP openssl functions encrypt data with openssl_encrypt().

gd Functions

PHP gd functions process images with imagecreate.

xml Functions

PHP xml functions parse XML with SimpleXML and DOMDocument.

zip Functions

PHP zip functions create ZIPs with ZipArchive.

spl Functions

PHP spl functions use ArrayObject for advanced data handling.

bcmath Functions

PHP bcmath functions perform precise math with bcadd.

intl Functions

PHP intl functions format numbers with NumberFormatter.

XML Expat

PHP XML Expat parses XML streams efficiently.

Error Handling

PHP error handling uses set_error_handler for custom logs.

Exception Handling

PHP exception handling creates custom Exception classes.

Singleton Pattern

PHP singleton pattern ensures single instance classes.

Factory Pattern

PHP factory pattern creates objects with simple factories.

Autoloading

PHP autoloading uses spl_autoload_register, with Composer.

REST API Handling

PHP REST APIs return JSON responses with HTTP headers.

Template Engine

PHP template engines use output buffering for views.

AJAX Intro

PHP AJAX enables asynchronous requests for dynamic content.

Login System

PHP login system uses sessions and password hashing.

Form Processing

PHP form processing validates inputs with filter_input().

File Upload System

PHP file upload system validates size and type securely.

CRUD Operations

PHP CRUD operations use prepared statements for MySQL.

JSON API

PHP JSON API creates endpoints with HTTP headers.

Email Sending

PHP email sending uses mail() or PHPMailer with SMTP.

Pagination

PHP pagination uses LIMIT/OFFSET for database results.

Search Filter

PHP search filters use LIKE queries for database searches.

Dynamic Menu

PHP dynamic menu highlights active states dynamically.

Image Resize

PHP image resizing uses GD with quality adjustments.

CSV Export

PHP CSV export uses fputcsv() for data output.

XML Parsing

PHP XML parsing uses SimpleXML with error handling.

Session Cart

PHP session cart manages items with array manipulation.

URL Routing

PHP URL routing uses .htaccess for clean URLs.

Error Logging

PHP error logging writes to files with error_log().

Date Formatting

PHP date formatting uses DateTime with timezone support.

String Sanitization

PHP string sanitization uses htmlspecialchars() for safety.

Password Reset

PHP password reset uses secure token generation.

Rate Limiting

PHP rate limiting uses sessions for request control.

CSRF Protection

PHP CSRF protection validates tokens for form security.

Dynamic Table

PHP dynamic tables render data with HTML styling.

RSS Feed

PHP RSS feed generates XML for content syndication.

Abstract Classes

PHP abstract classes define methods for inheritance.

Static Methods

PHP static methods belong to classes, not instances.

Static Properties

PHP static properties share data across class instances.

Namespaces

PHP namespaces organize code, preventing name conflicts.

Destructor

PHP destructors clean up resources with __destruct.

Welcome to PHP Pass - Your Gateway to PHP Coding

Basics

Arrays

Strings

Forms

Sessions & Cookies

File Handling

Database Access

Standard Library

Patterns

Examples

OOP