[Solved] All columns not inserted in the database

by 


<input name="h" type="hidden" id="h" value="0" />

$num =  $_POST['h'];
for ($i=0; $i<=$num; $i++)

value = 0 and 0<=0 is only one loop 😉

you set in html h to 0, so $num is allways 0.
you can set $num to the count of submited rows by

$num = count($_POST['activityname']);

but that works only if you fill out the activityname field or you can set the $num to the count of your rows.

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solved All columns not inserted in the database