PHP Classes

PDO Query Builder: Compose and execute SQL queries using PDO

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query-builder-pdo 0.18MIT/X Consortium ...5PHP 5, Databases


This class can compose and execute SQL queries using PDO.

It extends the PDO class to provide a fluent interface to compose SQL queries of several types and a range of query parameter clauses.

Currently it can compose and run SQL INSERT, REPLACE, UPDATE and DELETE queries.

It can also compose SQL clauses for LEFT JOIN, HAVE, WHERE, GROUP BY, ORDER, LIMIT and OFFSET.

The query results may be cached using memcache.

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<h1>Query builder for PDO with memcache support</h1>

It’s developed as fluent interface design. You can easily access to database just by using select functions anywhere you want.

<b>Build query:</b> select(‘users’)->where(‘user_id = “’. $user_id .’” ’)->limit(1);

<b>Run query:</b> select(‘users’)->where(‘user_id = “’. $user_id .’” ’)->limit(1)->run;

<b>Fetch result</b> select(‘users’)->where(‘user_id = “’. $user_id .’” ’)->limit(1)->result();

Easy to read & write, isn’t it? You can use helper functions insert(), replace(), update(), delete() and select() in everywhere including functions without calling global $pdo. For other features please call global $pdo variable.

Let’s look it deeply with examples… For examples I will use ‘users’ as table name of users, and ‘langs’ for table name of available languages

<b>find(‘users’, 1)</b> Returns just one row of selected table with the match of first column

<b>select(‘users’)</b> Returns the row of selected table It means “select from” to change use ->which() after select()

<b>left(‘langs ON langs.lang_id = users.lang_id’)</b> LEFT JOIN statement for select, usage is; select(‘users’)->left(‘langs ON langs.lang_id = users.lang_id’)->results();

<b>insert(‘users’)->values(array)</b> insert(‘users’)->values(array(‘user_name’=>’Jon Snow’));

<b>replace(‘users’)->values(array)</b> replace(‘users’)->values(array(‘user_name’=>’Jon Snow’));

<b>update(‘users’)->values(array)</b> update(‘users’)->values(array(‘user_name’=>’Jon Snow’))->where(‘user_id = 1’);

<b>where()</b> select(‘users’)->where(‘user_id = 1’)->result();

<b>* which()</b> I know which statement is a little bit odd but it’s simple and points * for select queries like; select(‘users’)->which(‘user_name, users.lang_id AS lang_id)

<b>group()</b> select(‘users’)->group(‘lang_id’);

<b>have()</b> select(‘users’)->have(‘lang_id’);

<b>order()</b> ->order(‘user_id ASC’);

<b>limit()</b> ->limit(10);

<b>offset()</b> ->offset(10);

<b>column() – final function </b> column(‘users’)

<b>write() – final function</b> shows query

<b>* run() – final function</b> ->run();

<b>* result() – final function</b> ->result();

<b>* results() – final function</b> ->results();

<b>results_pairs() – final function (Beta)</b> Gather results as pair, is very useful when working with lists ->results_pairs();

<b>PS:</b> You can send arrays as parameters to insert or update a column, query builder will automatically detect and change it into json

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