本文介绍了使用数组键和值来创建SQL SELECT语句的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我想通过一个包含键和值的数组。

键是列和值选择的值。

我试图写一个函数在那里我可以传递一个数组,并使用键和值作为表的列和值。例如:

  $阵列=阵列(用户=>中乔,USER_ID =2);

我需要的sql语句中像这样创建:

  select * from表,其中$键= $价值;


解决方案

这是你想要什么:

 < PHP
/ **
 * @参数数组WHERE子句
 * @返回字符串
 * /
功能sql_select中(数组$对){
  //初始化刚刚COND数组:
  $条件=阵列();  的foreach($对作为重点$ = GT; $值){
    //噢,你还可以自动prevent SQL注入
    $值= mysql_real_escape_string($值);    $条件[] ={$ key}的='{$}价值';
  } //为WHERE子句prepare:
 $条件=加入(和,$条件);
 //返回prepared字符串:
 返回SELECT * FROM your_table其中{$}条件;
}//打印:SELECT * FROM your_table其中user ='一些'AND年龄='10'
打印sql_select中(阵列('用户'=>'有些','年龄'=> 10));

这就是所谓的ORM的方法。

I am trying to pass a array that contains keys and values.

The keys are columns and values are the values to select.

I am trying to write a function where I can pass a array and use the key and values as the column and values of a table. for example:

$array = array("user"=>"joe", user_id="2");

I need the sql statement to be created like so:

select * from table where $key = $value;
解决方案

This is what you want:

<?php


/**
 * @param array for WHERE clause
 * @return string
 */
function sql_select(array $pair){
  //just init cond array:
  $condition = array();

  foreach ( $pair as $key => $value){
    //oh yeah, you can also automatically prevent SQL injection
    $value = mysql_real_escape_string($value);

    $condition[] = "{$key} = '{$value}'";
  }

 //Prepare for WHERE clause:
 $condition = join(' AND ', $condition);
 //Return prepared string:
 return "SELECT * FROM your_table WHERE {$condition}";
}

//print: SELECT * FROM your_table WHERE user = 'some' AND age = '10'
print sql_select(array('user' => 'some', 'age' => 10));

This is called ORM approach.

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05-29 17:52