Question

我希望我的搜索能够专注于URL字符串中的变量。目前它使用基于表单的搜索。

它使用此

<?php
    include('db.php');  // include your code to connect to DB.
    $tbl_name="mobile";     //your table name

$whereClauses = array(); 
if (! empty($_POST['Model'])) $whereClauses[] ="model='".mysql_real_escape_string($_POST['Model'])."'"; 
if (! empty($_POST['Mins'])) $whereClauses[] ="minutes='".mysql_real_escape_string($_POST['Mins'])."'"; 
if (! empty($_POST['Texts'])) $whereClauses[] ="texts='".mysql_real_escape_string($_POST['Texts'])."'"; 
if (! empty($_POST['Freegifts'])) $whereClauses[] ="free_gift='".mysql_real_escape_string($_POST['Freegifts'])."'"; 
if (! empty($_POST['Network'])) $whereClauses[] ="network_name='".mysql_real_escape_string($_POST['Network'])."'"; 
if (! empty($_POST['Merchant'])) $whereClauses[] ="merchant_category='".mysql_real_escape_string($_POST['Merchant'])."'"; 
$where = ''; 
if (count($whereClauses) > 0) { $where = ' WHERE '.implode(' AND ',$whereClauses); } 
$sql = mysql_query("SELECT * FROM $tbl_name".$where); 
?>

但是，我已将此添加到我的页面中：

<?php
    $model = $_GET['model']; //gets model from URL
    $mins = $_GET['mins']; //gets mins from URL
    $texts = $_GET['texts']; //gets mins from URL
    $freegift = $_GET['free-gift']; //gets mins from URL
    $network = $_GET['network']; //gets mins from URL
    $plan = $_GET['plan']; //gets mins from URL
?>

需要不是所有变量都是必需的。任何帮助将不胜感激。

提前致谢：）

Answer 1

有许多选项会返回值或NULL：

<?php
       $model = (isset($_GET['model']) ? $_GET['model'] : NULL);
        $mins = (isset($_GET['mins'])  ? $_GET['mins']  : NULL);    
       $texts = (isset($_GET['texts']) ? $_GET['texts'] : NULL); 
    $freegift = (isset($_GET['free-gift']) ? $_GET['free-gift'] : NULL);
     $network = (isset($_GET['network'])   ? $_GET['network']   : NULL);
        $plan = (isset($_GET['plan'])  ? $_GET['plan']  : NULL);
?>

这将从相应的$ _GET元素中获取变量，仅当有一组时才会获得。

替代语法（更短）：

<?php
       $model = ($_GET['model'] ? $_GET['model'] : NULL);
        $mins = ($_GET['mins']  ? $_GET['mins']  : NULL);    
       $texts = ($_GET['texts'] ? $_GET['texts'] : NULL); 
    $freegift = ($_GET['free-gift'] ? $_GET['free-gift'] : NULL);
     $network = ($_GET['network']   ? $_GET['network']   : NULL);
        $plan = ($_GET['plan']  ? $_GET['plan']  : NULL);
?>

替代方案（未经测试）：

<?php
$vars = array('model','mins','texts','free-gift','network','plan');

foreach($vars as $value) {
    $$value = (isset($_GET[$value]) ? $_GET[$value] : NULL);
}
?>

修改 的为了根据它设置WHERE子句，我建议：

<?php $vars = array('model','mins','texts','free-gift','network','plan'); foreach($vars as $value) { $$value = (isset($_GET[$value]) ? $_GET[$value] : NULL); unset $vars[$value]; //sweeping the NULL ones } $where_clause = $vars[0]; //the only remaining value after previous cleanup ?>

根据URL变量进行搜索

1 个答案: