小知识点总结_PHP教程

checkbox 用法

 <input id="flagc" type ="checkbox" value="c" name="flags[]"<?php if(strpos($row['flag'],'c')!==false) echo "checked='checked'" ;?>/>推荐[c]
			    <input id="flaga" type ="checkbox" value="a" name="flags[]"<?php if(strpos($row['flag'],'a')!==false) echo "checked='checked'" ;?>/>特荐[a]
			    <input id="flagh" type ="checkbox" value="h" name="flags[]"<?php if(strpos($row['flag'],'h')!==false) echo "checked='checked'" ;?>/>头条[h]
			    <input id="flago" type ="checkbox" value="o" name="flags[]"<?php if(strpos($row['flag'],'o')!==false) echo "checked='checked'" ;?>/>热门[o]
			    <input id="flagn" type ="checkbox" value="n" name="flags[]"<?php if(strpos($row['flag'],'n')!==false) echo "checked='checked'" ;?>/>最新[n]

 这里strpos是检测字符串中是否包含某个字符串！

strpos 返回整数（找不到返回逻辑假）
'true' 在数值比较中被转换为 0
如果 $row['flag'] 第一个字符为 c 时，恰巧被匹配
其他字符返回的都不是 0，所以不会匹配成功。

当参数传递为字符串是如何转变成数组与显示输出。

 <?php
			 $flags = explode(',',$v['flag']) ;
			 foreach($flags as $x){
			     switch($x){
				     case c:
					 echo "推荐[c]";
					 break;
					 case a:
					 echo "特荐[a]";
					 break;
					 case h:
					 echo "头条[h]";
					 break;
					 case o:
					 echo "热门[o]";
					 break;
					 case n:
					 echo "最新[n]";
					 break;
				 }
			 }
			?>

 数据库插入

else if($_GET['do']=='editok'){
	$id = $_POST['id'];
	$checked = $_POST['checked'];
	$flag = $_POST['flags'];
	$flags=implode(",",$flag);
	$sql = 'update djs_skstudent_voice set checked='.$checked.',flag="'.$flags.'" where id='.$id;
	$dsql->ExecuteNoneQuery($sql);
	echo "<script> window.location.href='student_voice.php';</script>";

}

http://www.bkjia.com/PHPjc/729845.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/729845.htmlTechArticlecheckbox 用法 input id="flagc" type ="checkbox" value="c" name="flags[]"?php if(strpos($row['flag'],'c')!==false) echo "checked='checked'" ;?/推荐[c] input id="flaga" type ="ch...