在（PHP SQL查询生成器）中找不到接口“ ...”

Question

I'm trying to use P HP SQL Query Builder in a project I'm working on. I am installing it manually. I did this by copying the src directory into my project and then using the following code within my class:

$this->builder = new NilPortugues\\Sql\\QueryBuilder\\Builder\\GenericBuilder();

The error I get whenever the builder is used is:

[18-Apr-2017 12:57:48 UTC] PHP Fatal error:  Interface 'NilPortugues\Sql\QueryBuilder\Builder\BuilderInterface' not found in /home/thomassm/public_html/php/lib/sqlbuilder/Builder/GenericBuilder.php on line 24

GenericBuilder.php

namespace NilPortugues\Sql\QueryBuilder\Builder;

use NilPortugues\Sql\QueryBuilder\Builder\Syntax\WriterFactory;
use NilPortugues\Sql\QueryBuilder\Manipulation\AbstractBaseQuery;
use NilPortugues\Sql\QueryBuilder\Manipulation\QueryInterface;
use NilPortugues\Sql\QueryBuilder\Manipulation\QueryFactory;
use NilPortugues\Sql\QueryBuilder\Manipulation\Select;
use NilPortugues\Sql\QueryBuilder\Syntax\Column;
use NilPortugues\Sql\QueryBuilder\Syntax\Table;

/**
 * Class Generic.
 */
class GenericBuilder implements BuilderInterface
{//...}

BuilderInterface.php

namespace NilPortugues\Sql\QueryBuilder\Builder;

use NilPortugues\Sql\QueryBuilder\Manipulation\QueryInterface;

/**
 * Interface BuilderInterface.
 */
interface BuilderInterface
{
    /**
     * @param QueryInterface $query
     *
     * @return string
     */
    public function write(QueryInterface $query);

    /**
     * @param QueryInterface $query
     *
     * @return string
     */
    public function writeFormatted(QueryInterface $query);
}

I assume the error is somehow caused by the way the files are called, any suggestions?

Answer 1

I am installing it manually. I did this by copying the src directory into my project and then using the following code within my class: ...

Every source file should be included through include / requrie before using. But PHP allow to setup autoloading for classes, interfaces and traits. In short, when runtime meets an undefined class then a special callback invokes, which can load the relevant file.

Although formally the autoloading rules can be arbitrary, but most of the modern projects supports the common community standard: PSR-4 Autoloader . So, you need an implementation of this standard.

As said in the library description, the recommended way to install is through Composer :

php composer.phar require nilportugues/sql-query-builder

Composer provides own PSR-4 implementation and generates file vendor/autoload.php . Usually this file included at the application entry point. It allow using the classes from all required libraries.

You can use the packages without the Composer ( relevant answer ). But it requires a lot of work (you still need an PSR-4 autoloader) and this way is rarely used today.