php查询
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查询页面代码简要说明：14-15为加载DBDA页面；16-41为判断选项或关键字查询是否为非空，判断从form表单传来的值是否为非空，把字符串进行拼接
1 <title>无标题文档</title> 2 <style type="text/css"> 3 .wai{ width:100%; height:50px;} 4 .a{ width:100px; height:30px; float:left} 5 .nei{ width:100%; height:50px;} 6 .b{ width:100px; height:30px; float:left} 7 .c{ width:100px; height:30px; float:left} 8 .nw{ width:100%; height:50px;} 9 </style> 10 </head> 11 12 <body> 13 <?php 14 require_once "./DBDA.class.php"; 15 $db = new DBDA(); 16 $tj1 = " 1=1 "; 17 $tj2 = " 1=1 "; 18 $tj3 = " 1=1 "; 19 $tj4 = " 1=1 "; 20 $arr1 = array(); 21 if(!empty($_POST["qy"])){ 22 $arr1 = $_POST["qy"]; 23 $str = implode("\',\'",$arr1); 24 $tj1 = "area in (\'{$str}\')"; 25 } 26 $arr2 =array(); 27 if(!empty($_POST["zl"])){ 28 $arr2 =$_POST["zl"]; 29 $str = implode("\',\'",$arr2); 30 $tj2 = "renttype in (\'{$str}\')"; 31 }; 32 $arr3 = array(); 33 if(!empty($_POST["fw"])){ 34 $arr3 = $_POST["fw"]; 35 $str = implode("\',\'",$arr3); 36 $tj3 = "housetype in (\'{$str}\')"; 37 } 38 if(!empty($_POST["key"])){ 39 $key = $_POST["key"]; 40 $tj4 = " keyword like \'%{$key}%\' "; 41 } 42 ?> 43 <form action="chaxunhouse.php" method="post"> 44 <div class="wai"> 45 区域：<input type="checkbox" id="qy"/>全选<br /> 46 <div> 47 <?php 48 $sqlqy = "select distinct area from house"; 49 $arr = $db->query($sqlqy); 50 foreach($arr as $v){ 51 if(in_array($v[0],$arr1)){ 52 echo "<div class=\'a\'><input type=\'checkbox\' name=\'qy[]\' value=\'{$v[0]}\' class=\'qy\' checked=\'checked\'>{$v[0]}</div>"; 53 }else{ 54 echo "<div class=\'a\'><input type=\'checkbox\' name=\'qy[]\' value=\'{$v[0]}\' class=\'qy\'>{$v[0]}</div> 55 56 ";} 57 } 58 ?></div></div> 59 <div class="nw"> 60 租赁类型：<input type="checkbox" id="zl"/>全选<br /> 61 <div> 62 <?php 63 $sqlzl = "select distinct renttype from house"; 64 $arrzl = $db->query($sqlzl); 65 foreach($arrzl as $v){ 66 if(in_array($v[0],$arr2)){ 67 echo "<div class=\'c\'><input type=\'checkbox\' name=\'zl[]\' value=\'{$v[0]}\' class=\'zl\' checked=\'checked\'>{$v[0]}</div>}";} 68 else{echo "<div class=\'c\'><input type=\'checkbox\' name=\'zl[]\' value=\'{$v[0]}\' class=\'zl\'>{$v[0]}</div> 69 70 ";} 71 } 72 ?></div></div> 73 <div class="nei"> 74 房屋类型：<input type="checkbox" id="fw"/>全选<br /> 75 <div> 76 <?php 77 $sqlfw = "select distinct housetype from house"; 78 $arrfw = $db->query($sqlfw); 79 foreach($arrfw as $v){ 80 if(in_array($v[0],$arr3)){ 81 echo "<div class=\'b\'><input type=\'checkbox\' name=\'fw[]\' value=\'{$v[0]}\' class=\'fw\' checked=\'checked\'>{$v[0]}</div>"; 82 }else{ 83 echo "<div class=\'b\'><input type=\'checkbox\' name=\'fw[]\' value=\'{$v[0]}\' class=\'fw\'>{$v[0]}</div> 84 85 ";} 86 } 87 ?></div></div> 88 <input type="submit" value="查询" /> 89 <input type="text" name="key"/> 90 </form> 91 <table border="1" cellpadding="0" cellspacing="1"> 92 <tr> 93 <td>关键字</td> 94 <td>区域</td> 95 <td>使用面积</td> 96 <td>租金</td> 97 <td>租赁类型</td> 98 <td>房屋类型</td> 99 </tr> 100 <?php 101 $sql = "select * from house where {$tj1} and {$tj2} and {$tj3} and {$tj4}"; 102 $arr = $db->query($sql); 103 var_dump($sql); 104 foreach($arr as $v){ 105 echo "<tr> 106 <td>{$v[1]}</td> 107 <td>{$v[2]}</td> 108 <td>{$v[3]}</td> 109 <td>{$v[4]}</td> 110 <td>{$v[5]}</td> 111 <td>{$v[6]}</td> 112 </tr>"; 113 } 114 ?> 115 </table> 116 </body>
43-90的页面显示达到的效果
91-102的页面显示效果，通过sql语句实现查询的效果
$sql= "select * from house"改为条件查询字符串拼接即
\'select * from house where area in (\'锦绣园\') and renttype in (\'合租\') and housetype in (\'三室一厅\') and keyword like \'%淄川%\' \'
$sql = "select * from house where {$tj1} and {$tj2} and {$tj3} and {$tj4}";{$tj1}是通过代码16-41来获得
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