一、转自：http://www.cnblogs.com/richardw/archive/2012/10/06/2713027.html
二、转自：https://sjolzy.cn/PHP-Class-ezSQL-database-operations.html（PHP数据库操作类 - ezSQL）

一、操作MySQL，使用ezSQL，简单而方便

最近使用PHP做点小东东，使用了ezSQL，真的感觉很简单很ez。

ezSQL官方下载地址：http://justinvincent.com/ezsql

使用示例：

取数值：

$var = $db->get_var("SELECT count(*) FROM users");

取对象：

$user = $db->get_row("SELECT name,email FROM users WHERE id = 2");

取数组：

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$users = $db->get_results("SELECT name, email FROM users");
foreach ( $users as $user )
{
    // 使用对象语法
    echo $user->name;
    echo $user->email;
}

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可以看出，其实函数返回值为二维数组，经foreach分解后，$user为每条记录的内容，可直接用$user->字段名的方式访问。

get_results()还有另一种调用方式：

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// Extract results into the array $dogs (and evaluate if there are any results at the same time)..
if ( $dogs = $db->get_results(“SELECT breed, owner, name FROM dogs”, ARRAY_A) )
{
            // Loop through the resulting array on the index $dogs[n]
            foreach ( $dogs as $dog_detail )
            {
 
                        // Loop through the resulting array
                        foreach ( $dogs_detail as $key => $val )
                        {
                                    // Access and format data using $key and $val pairs..
                                    echo “<b>” . ucfirst($key) . “</b>: $val<br>”;
                        }
 
                        // Do a P between dogs..
                        echo “<p>”;
            }
}
else
{
            // If no users were found then if evaluates to false..
            echo “No dogs found.”;
}

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输出结果：

Output:
Breed: Boxer
Owner: Amy
Name: Tyson

Breed: Labrador
Owner: Lee
Name: Henry

Breed: Dachshund
Owner: Mary
Name: Jasmine

执行Insert操作：

$db->query("INSERT INTO users (id, name, email) VALUES (NULL,'justin','jv@foo.com')");

调试信息

// Display last query and all associated results

$db->debug();

四种方法：

bool    $db->query(query)
var    $db->get_var(query)
mixed    $db->get_row(query)
mixed    $db->get_results(query)
ezSQL functions

$db->get_results -- get multiple row result set from the database (or previously cached results)

$db->get_row -- get one row from the database (or previously cached results)

$db->get_col -- get one column from query (or previously cached results) based on column offset

$db->get_var -- get one variable, from one row, from the database (or previously cached results)

$db->query -- send a query to the database (and if any results, cache them)

$db->debug -- print last sql query and returned results (if any)

$db->vardump -- print the contents and structure of any variable

$db->select -- select a new database to work with

$db->get_col_info -- get information about one or all columns such as column name or type

$db->hide_errors -- turn ezSQL error output to browser off

$db->show_errors -- turn ezSQL error output to browser on

$db->escape -- Format a string correctly to stop accidental mal formed queries under all PHP conditions

$db = new db -- Initiate new db object.

 

ezSQL variables

$db->num_rows – Number of rows that were returned (by the database) for the last query (if any)

$db->insert_id -- ID generated from the AUTO_INCRIMENT of the previous INSERT operation (if any)

$db->rows_affected -- Number of rows affected (in the database) by the last INSERT, UPDATE or DELETE (if any)

$db->num_queries -- Keeps track of exactly how many 'real' (not cached) queries were executed during the lifetime of the current script

$db->debug_all – If set to true (i.e. $db->debug_all = true;) Then it will print out ALL queries and ALL results of your script.

$db->cache_dir – Path to mySQL caching dir.

$db->cache_queries – Boolean flag (see mysql/disk_cache_example.php)

$db->cache_inserts – Boolean flag (see mysql/disk_cache_example.php)

$db->use_disk_cache – Boolean flag (see mysql/disk_cache_example.php)

$db->cache_timeout – Number in hours (see mysql/disk_cache_example.php)

二、PHP数据库操作类 - ezSQL

07 August 2010 10:57 Saturdayby Sjolzy
ezSQL 下载地址：//sjolzy.cn/php/ezSQL/bak/ez_sql_2.05.zip

新版本是2.05添加了很多支持，包括 CodeIgniter,MSSQL, PDO等等。

查看示例:

Example 1

// Select multiple records from the database and print them out..
$users = $db->get_results("SELECT name, email FROM users");
foreach ( $users as $user ) {
            // Access data using object syntax
            echo $user->name;
            echo $user->email;
}

Example 2

// Get one row from the database and print it out..
$user = $db->get_row("SELECT name,email FROM users WHERE id = 2");
echo $user->name;
echo $user->email;

Example 3

// Get one variable from the database and print it out..
$var = $db->get_var("SELECT count(*) FROM users");
echo $var;

Example 4

// Insert into the database
$db->query("INSERT INTO users (id, name, email) VALUES (NULL,'justin','jv@foo.com')");

Example 5

// Update the database
$db->query("UPDATE users SET name = 'Justin' WHERE id = 2)");

Example 6

// Display last query and all associated results
$db->debug();

Example 7

// Display the structure and contents of any result(s) .. or any variable
$results = $db->get_results("SELECT name, email FROM users");
$db->vardump($results);

Example 8

// Get 'one column' (based on column index) and print it out..
$names = $db->get_col("SELECT name,email FROM users",0)
foreach ( $names as $name ) {
    echo $name;
}

Example 9

// Same as above ‘but quicker’
foreach ( $db->get_col("SELECT name,email FROM users",0) as $name ) {
    echo $name;
}

Example 10

// Map out the full schema of any given database and print it out..
$db->select("my_database");
foreach ( $db->get_col("SHOW TABLES",0) as $table_name ) {
    $db->debug();
    $db->get_results("DESC $table_name");
}
$db->debug();

转自永久地址：https://sjolzy.cn/PHP-Class-ezSQL-database-operations.html

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