php - I want to get checkbox already checked when we retrieve data from database in edit form - 


<?php     $a=array('cricket','reading','travelling','swimming','badminton');$hb=explode(" ",$row['hobby']); ?>     hobbies:<input type="checkbox" name="chk[]" value="cricket"<?php if(in_array('cricket',$hb)){echo 'checked="checked"'; }?> />cricket             <input type="checkbox" name="chk[]" value="reading" <?php if(in_array('reading',$hb)) { echo 'checked="checked"'; }?> />reading             <input type="checkbox" name="chk[]" value="travelling" <?php if(in_array('travelling',$hb)) { echo 'checked="checked"'; }?> />travelling             <input type="checkbox" name="chk[]" value="swimming" <?php if(in_array('swimming',$hb)) { echo 'checked="checked"'; }?> />swimming             <input type="checkbox" name="chk[]" value="badminton" <?php if(in_array('badminton',$hb)) { echo 'checked="checked"'; }?> />badminton

the following code complete trying do. have test case providing "row" data source. set options (which want data source well), iterate through options, validate in array, , add check field if required. shows clear distinction between html , php future developers review code. 

<?php      // test case     $row['hobby'] = 'cricket travelling';      // logic     $formhtml = "";     $options = array('cricket','reading','travelling','swimming','badminton');      $selectedhobbies = explode(" ",$row['hobby']);     foreach($options $option){         $checked = (in_array($option, $selectedhobbies)) ? "checked=checked" : "";         $formhtml .= <<<html <input type="checkbox" name="chk[]" value="{$option}" {$checked} />{$option} html;      }  ?>  <html> <head>  </head> <body>     hobbies:      <?php echo $formhtml; ?> </body> </html>

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