PHP anonymous _php tutorial for using anonymous functions to manipulate databases

Example of using anonymous functions in PHP to manipulate databases, PHP anonymous

Copy the Code code as follows:
Base DAO class illustrating the usefulness of closures.
* Handles opening and closing of connections.
* Adds slashes SQL
* Type checking of SQL parameters and casts as appropriate
* Provides hook for processing of result set and emitting one or more objects.
* provides hook for accessing underlying link and result objects.

<?php

Define ("UserName", "root");
Define ("Password", "root");
Define ("DbName", "ahcdb");
Define ("HostName", "localhost");

Class Basedao {

function getconnection () {
$link = mysql_connect (hostName, userName, password);
if (! $link)
Die ("Could Not connect:". Mysql_error ());
if (!mysql_select_db (dbName))
Die ("Could not select Database:". Mysql_error ());
return $link;
}

Function SetParams (& $sql, $params) {
if ($params! = null)
$sql = vsprintf ($sql, Array_map (function ($n) {
if (Is_int ($n))
return (int) $n;
if (Is_float ($n))
return (float) $n;
if (is_string ($n))
Return "'". Mysql_real_escape_string ($n). "'";
Return mysql_real_escape_string ($n);
}, $params));
}

function ExecuteQuery ($sql, $params, $callback = null) {
$link = $this->getconnection ();
$this->setparams ($sql, $params);
$return = null;
if ($result = mysql_query ($sql, $link))! = null)
if ($callback! = null)
$return = $callback ($result, $link);
if ($link! = null)
Mysql_close ($link);
if (! $result)
Die ("Fatal error:invalid query ' $sql ':". Mysql_error ());
return $return;
}

function GetList ($sql, $params, $callback) {
return $this->executequery ($sql, $params, function ($result, $link) use ($callback) {
$idx = 0;
$list = Array ();
while ($row = Mysql_fetch_assoc ($result))
if ($callback! = null)
$list [$idx] = $callback ($idx + +, $row);
return $list;
});
}

function Getsingle ($sql, $params, $callback) {
return $this->executequery ($sql, $params, function ($result, $link) use ($callback) {
if ($row = Mysql_fetch_assoc ($result))
$obj = $callback ($row);
return $obj;
});
}
}

Class Example {
var $id;
var $name;

function Example ($id, $name) {
$this->id = $id;
$this->name = $name;
}

function SetId ($id) {
$this->id = $id;
}
}

Class Exampledao extends Basedao {


function GetAll () {
Return Parent::getlist ("SELECT * from Nodes", NULL, function ($IDX, $row) {
return new Example ($row ["id"], $row ["name"]);
});
}

function Load ($id) {
Return Parent::getsingle ("SELECT * from nodes where id =%1\ $s", array ($id), function ($row) {
return new Example ($row ["id"], $row ["name"]);
});
}

function Update ($example) {
Return parent::executequery ("update nodes set name = ' WHERE id =-1", NULL, function ($result, $link) {
return $result;
});
}

function Insert (& $example) {
Return Parent::executequery ("INSERT INTO nodes", NULL, function ($result, $link) use ($example) {
$id = mysql_insert_id ($link);
$example->setid ($id);
return $result;
});
}
}

$exampleDao = new Exampledao ();

$list = $exampleDao->getall ());

$exampleObject = $exampleDao->load (1));

$exampleDao->update ($exampleObject);

?>

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