jquery - PHP - Checkbox saving value to Database -


i have few checkbox in form , i'm setting each value if checked or unchecked. checkbox checked has value of true , unchecked false if have of checkbox checked(value true) , unchecked 1 of them, other checkbox unchecked , value on database become false. can't understand behavior below code

html

                    <label><input type="checkbox" id="trans_val_identical" value="false">ii transaction value of identical goods</label>                     <label><input type="checkbox" id="trans_val_identical" checked="checked" value="false">ii transaction value of identical goods</label>                 </div>               <div class="checkbox">                       <label><input type="checkbox" id="trans_val_similar" value="false">iii transaction value of similar goods</label>                       <label><input type="checkbox" id="trans_val_similar" checked="checked" value="false">iii transaction value of similar goods</label>                </div>               <div class="checkbox">                       <label><input type="checkbox" id="deductive_val" value="false">iv deductive value</label>                       <label><input type="checkbox" id="deductive_val" checked="checked" value="false">iv deductive value</label>                </div>               <div class="checkbox">                       <label><input type="checkbox" id="computed_val" value="false">v computed value</label>                        <label><input type="checkbox"  id="computed_val" checked="checked" value="false">v computed value</label>                </div>               <div class="checkbox">                       <label><input type="checkbox" id="fallback_val" value="false">vi fallback value</label>                       <label><input type="checkbox" id="fallback_val" checked="checked" value="false">vi fallback value</label>

js

    $('#trans_val_identical').change(function(){      if($(this).attr('checked')){           $(this).val('true');      }else{           $(this).val('false');      } }); $('#trans_val_similar').change(function(){      if($(this).attr('checked')){           $(this).val('true');      }else{           $(this).val('false');      } }); $('#deductive_val').change(function(){      if($(this).attr('checked')){           $(this).val('true');      }else{           $(this).val('false');      } }); $('#computed_val').change(function(){      if($(this).attr('checked')){           $(this).val('true');      }else{           $(this).val('false');      } }); $('#fallback_val').change(function(){      if($(this).attr('checked')){           $(this).val('true');      }else{           $(this).val('false');      } });

there couple of issues here:

the first checkbox elements don't have names, means aren't going passed server values. make sure have names can refer them in php script , save them database.

second, understanding of how checkboxes submitted in form bit off. value attribute of checkbox submitted if it's checked, , it's not submitted if it's unchecked. shouldn't change value true false or vice-versa.

so if have this:

<input type="checkbox" name="trans_val_identical" value="1">

then $_post['trans_val_identical'] (assuming you're using post submit form) "1" if checkbox checked, , non-existent if checkbox unchecked. check if checkbox checked in php, you'd use this:

if ( isset( $_post['trans_val_identical'] )) {     // checkbox checked } else {     // checkbox not checked }

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