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PHP 7 Programming Cookbook

PHP 7 Programming Cookbook

By : Bierer
4.1 (8)
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PHP 7 Programming Cookbook

PHP 7 Programming Cookbook

4.1 (8)
By: Bierer

Overview of this book

PHP 7 comes with a myriad of new features and great tools to optimize your code and make your code perform faster than in previous versions. Most importantly, it allows you to maintain high traffic on your websites with low-cost hardware and servers through a multithreading web server. This book demonstrates intermediate to advanced PHP techniques with a focus on PHP 7. Each recipe is designed to solve practical, real-world problems faced by PHP developers like yourself every day. We also cover new ways of writing PHP code made possible only in version 7. In addition, we discuss backward-compatibility breaks and give you plenty of guidance on when and where PHP 5 code needs to be changed to produce the correct results when running under PHP 7. This book also incorporates the latest PHP 7.x features. By the end of the book, you will be equipped with the tools and skills required to deliver efficient applications for your websites and enterprises.
Table of Contents (16 chapters)
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15
Index

Implementing a search engine


In order to implement a search engine, we need to make provision for multiple columns to be included in the search. In addition, it's important to recognize that the search item might be found in the middle of the field, and that very rarely will users provide enough information for an exact match. Accordingly, we will rely heavily on the SQL LIKE %value% clause.

How to do it...

  1. First, we define a basic class to hold search criteria. The object contains three properties: the key, which ultimately represents a database column; the operator (LIKE, <, >, and so on); and optionally an item. The reason why an item is optional is that some operators, such as IS NOT NULL, do not require specific data:

    namespace Application\Database\Search;
    class Criteria
    {
      public $key;
      public $item;
      public $operator;
      public function __construct($key, $operator, $item = NULL)
      {
        $this->key  = $key;
        $this->operator = $operator;
        $this->item = $item;
      ...
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PHP 7 Programming Cookbook
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