Summary of small knowledge points_PHP tutorial

checkbox usage

 <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]

Here strpos is to detect whether the string contains a certain string!

strpos returns an integer (returns logical false if not found)
'true' is converted to 0
in numeric comparisons If the first character of $row['flag'] is c, it happens to be matched
Other characters returned are not 0, so the match will not be successful.

When the parameter is passed as a string, how to convert it into an array and display the output.

 <?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;
				 }
			 }
			?>

Database insertion

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 usage input id="flagc" type ="checkbox" value="c" name="flags[] "?php if(strpos($row['flag'],'c')!==false) echo "checked='checked'" ;?/Recommended [c] input id="flaga" type ="ch. ..