PHP 8 solutions dynamic web design and development made easy
Make your websites more dynamic by adding a feedback form, creating a private area where members can upload images that are automatically resized, or storing all your content in a database. David Powers has updated his definitive book to incorporate the latest techniques and changes to PHP with the...
| Otros Autores: | |
|---|---|
| Formato: | Libro electrónico |
| Idioma: | Inglés |
| Publicado: |
[California] :
Apress
[2022]
|
| Edición: | Fifth edition |
| Materias: | |
| Ver en Biblioteca Universitat Ramon Llull: | https://discovery.url.edu/permalink/34CSUC_URL/1im36ta/alma991009635712806719 |
Tabla de Contenidos:
- Intro
- Table of Contents
- About the Author
- About the Technical Reviewer
- Acknowledgments
- Introduction
- Chapter 1: What Is PHP 8?
- How PHP Has Grown
- How PHP Makes Pages Dynamic
- Creating Pages That Think for Themselves
- How Hard Is PHP to Use and Learn?
- Can I Just Copy and Paste the Code?
- How Safe Is PHP?
- What's New in PHP 8?
- What Software Do I Need to Write PHP?
- What to Look for When Choosing a PHP Editor
- So Let's Get On with It…
- Chapter 2: Getting Ready to Work with PHP
- Checking Whether Your Web Site Supports PHP
- Deciding Where to Test Your Pages
- What You Need for a Local Test Environment
- Setting Up on Windows
- Getting Windows to Display Filename Extensions
- Choosing a Web Server
- Installing an All-in-One Package on Windows
- Setting Up on macOS
- Installing MAMP
- Testing and Configuring MAMP
- Where to Locate Your PHP Files (Windows and Mac)
- Checking Your PHP Settings
- Displaying the Server Configuration with phpinfo()
- Editing php.ini
- What's Next?
- Chapter 3: How to Write PHP Scripts
- PHP: The Big Picture
- Telling the Server to Process PHP
- Embedding PHP in a Web Page
- Storing PHP in an External File
- Using Variables to Represent Changing Values
- Naming Variables
- Assigning Values to Variables
- Ending Commands with a Semicolon
- Commenting Scripts
- Single-Line Comments
- Multiline Comments
- Using Arrays to Store Multiple Values
- PHP's Built-In Superglobal Arrays
- Understanding When to Use Quotes
- Special Cases: True, False, and Null
- Making Decisions
- Making Comparisons
- Using Indenting and Whitespace for Clarity
- Using Loops for Repetitive Tasks
- Using Functions for Preset Tasks
- Displaying PHP Output
- Using the Short Echo Tag
- Joining Strings Together
- Working with Numbers
- Understanding PHP Error Messages.
- Why Is My Page Blank?
- PHP Quick Checklist
- Chapter 4: PHP: A Quick Reference
- Using PHP in an Existing Web Site
- Data Types in PHP
- Checking the Data Type of a Variable
- Explicitly Changing a Variable's Data Type
- Checking Whether a Variable Has Been Defined
- Doing Calculations with PHP
- Arithmetic Operators
- Using the Increment and Decrement Operators
- Determining the Order of Calculations
- Combining Calculations and Assignment
- Adding to an Existing String
- All You Ever Wanted to Know About Quotes-and More
- How PHP Treats Variables Inside Strings
- Using Escape Sequences Inside Double Quotes
- Embedding Associative Array Elements in a String
- Avoiding the Need to Escape Quotes with Heredoc Syntax
- Creating Arrays
- Building an Indexed Array
- Building an Associative Array
- Creating an Empty Array
- Multidimensional Arrays
- Using print_r() to Inspect an Array
- The Truth According to PHP
- Explicit Boolean Values
- Implicit Boolean ("Truthy" and "Falsy") Values
- Making Decisions by Comparing Two Values
- Testing More Than One Condition
- Using the switch Statement for Decision Chains
- Using a match Expression for Decision Chains
- Using the Ternary Operator
- Setting a Default Value with the Null Coalescing Operator
- Executing Code Repeatedly with a Loop
- Loops Using while and do . . . while
- The Versatile for Loop
- Looping Through Arrays and Objects with foreach
- Breaking Out of a Loop
- Modularizing Code with Functions
- Passing Values to Functions
- Setting Default Values for Arguments
- Variable Scope: Functions as Black Boxes
- Returning Values from Functions
- Generators: A Special Type of Function That Keeps on Giving
- Passing by Reference: Changing the Value of an Argument
- Functions That Accept a Variable Number of Arguments.
- Automatically Unpacking an Array Passed to a Function
- Optionally Specifying Data Types
- Specifying Multiple Data Types
- Using Named Arguments
- Where to Locate Custom-Built Functions
- Creating Anonymous Functions
- Using the Concise Anonymous Syntax of Arrow Functions
- Understanding PHP Classes and Objects
- Using PHP Built-In Classes
- Building Custom Classes
- Accessing Methods and Properties in a Class
- Setting the Visibility of Class Methods, Properties, and Constants
- Using Constructor Property Promotion
- Declaring and Using Class Constants
- Using a Namespace to Avoid Naming Conflicts
- Importing a Namespaced Class
- Handling Errors and Exceptions
- Creating New Variables Dynamically
- Now to the Solutions
- Chapter 5: Lightening Your Workload with Includes
- Including Code from External Files
- Introducing the PHP Include Commands
- Where PHP Looks for Include Files
- PHP Solution 5-1: Moving the Menu and Footer to Include Files
- Choosing the Right Filename Extension for Includes
- PHP Solution 5-2: Testing the Security of Includes
- PHP Solution 5-3: Automatically Indicating the Current Page
- PHP Solution 5-4: Automating a Page's Title from Its Filename
- PHP Solution 5-5: Handling Missing Variables
- Creating Pages with Changing Content
- PHP Solution 5-6: Automatically Updating a Copyright Notice
- PHP Solution 5-7: Displaying a Random Image
- PHP Solution 5-8: Adding a Caption to the Random Image
- Preventing Errors with Include Files
- Checking the Existence of Variables
- Checking Whether a Function or Class Has Been Defined
- Suppressing Error Messages on a Live Web Site
- Using the Error Control Operator
- Turning Off display_errors in the PHP Configuration
- Turning Off display_errors in an Individual File
- PHP Solution 5-9: Redirecting When an Include File Can't Be Found.
- Why Can't I Use Site Root-Relative Links with PHP Includes?
- Document-Relative Links
- Links Relative to the Site Root
- Links Inside Include Files
- Choosing Where to Locate Your Include Files
- Security Considerations with Includes
- Adjusting Your include_path
- Editing the include_path in php.ini or .user.ini
- Using .htaccess to Change the include_path
- Using set_include_path()
- Nesting Include Files
- Chapter Review
- Chapter 6: Bringing Forms to Life
- How PHP Gathers Information from a Form
- Understanding the Difference Between post and get
- Getting Form Data with PHP Superglobals
- Processing and Validating User Input
- Creating a Reusable Script
- PHP Solution 6-1: Preventing Cross-Site Scripting in a Self-Processing Form
- PHP Solution 6-2: Making Sure Required Fields Aren't Blank
- Preserving User Input When a Form Is Incomplete
- PHP Solution 6-3: Creating Sticky Form Fields
- Filtering Out Potential Attacks
- PHP Solution 6-4: Blocking Email Addresses That Contain Suspect Content
- Sending Email
- Using Additional Email Headers Safely
- PHP Solution 6-5: Adding Headers and Automating the Reply Address
- PHP Solution 6-6: Building the Message Body and Sending the Mail
- Troubleshooting mail()
- Handling Multiple-Choice Form Elements
- PHP Solution 6-7: Handling Radio Button Groups
- PHP Solution 6-8: Handling Check-Box Groups
- PHP Solution 6-9: Using a Drop-Down Option Menu
- PHP Solution 6-10: Handling a Multiple-Choice List
- PHP Solution 6-11: Handling a Single Check Box
- Chapter Review
- Chapter 7: Using PHP to Manage Files
- Checking That PHP Can Open a File
- Creating a Folder Outside the Server Root for Local Testing on Windows
- Creating a Folder Outside the Server Root for Local Testing on macOS
- Configuration Settings That Affect File Access
- Reading and Writing to Files.
- Reading Files in a Single Operation
- PHP Solution 7-1: Getting the Contents of a Text File
- Opening and Closing Files for Read/Write Operations
- Reading a File with fopen()
- PHP Solution 7-2: Extracting Data from a CSV File
- Replacing Content with fopen()
- Appending Content with fopen()
- Locking a File Before Writing
- Preventing Overwriting an Existing File
- Combined Read/Write Operations with fopen()
- Moving the Internal Pointer
- Exploring the File System
- Inspecting a Folder with scandir()
- Inspecting the Contents of a Folder with FilesystemIterator
- Restricting File Types with the RegexIterator
- PHP Solution 7-3: Building a Drop-Down Menu of Files
- PHP Solution 7-4: Creating a Generic File Selector
- Accessing Remote Files
- Consuming News and Other RSS Feeds
- Using SimpleXML
- PHP Solution 7-5: Consuming an RSS News Feed
- Creating a Download Link
- PHP Solution 7-6: Prompting a User to Download an Image
- Chapter Review
- Chapter 8: Working with Arrays
- Modifying Array Elements
- PHP Solution 8-1: Modify Array Elements with a Loop
- PHP Solution 8-2: Modify Array Elements with array_walk()
- PHP Solution 8-3: Modify Array Elements with array_map()
- Merging Arrays
- Using the Array Union Operator
- Using array_merge() and array_merge_recursive()
- Merging Two Indexed Arrays into an Associative Array
- Comparing Arrays
- Removing Duplicate Elements
- PHP Solution 8-4: Joining an Array with Commas
- Sorting Arrays
- PHP Solution 8-5: Custom Sorting with the Spaceship Operator
- Complex Sorting with array_multisort()
- PHP Solution 8-6: Sorting a Multidimensional Array with array_multisort()
- PHP Solution 8-7: Finding All Permutations of an Array
- Processing Array Data
- PHP Solution 8-8: Building Nested Lists Automatically
- PHP Solution 8-9: Extracting Data from JSON
- Automatically Assigning Array Elements to Variables.
