php - UPDATE reports successful but not updating the table -

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hey trying update table form have:

<?php include ('includes/header.php');  require ('../db_con.php');    // check valid document id, through or post: if ( (isset($_get['id'])) && (is_numeric($_get['id'])) ) { // view_docs.php     $id = $_get['id'];  } elseif ( (isset($_post['id'])) && (is_numeric($_post['id'])) ) { // form submission.     $id = $_post['id'];  } else { // no valid id, kill script.     echo '<p class="error">this page has been accessed in error.</p>';     exit(); }     $q = "select * cats cat_id = $id"; $r = mysqli_query($dbc, $q); ?>  <form method="post" action="actions/update_cat.php">     <input type="hidden" name="cat_id" value="<? echo $id ?>" />     <input type="text" name="cat_name" />     <br><br>     <input type="text" name="cat_color" />     <br><br>     <input type="text" name="cat_icon" />     <br><br>     <input type="submit" value="submit" /> </form>

when submit action script know passes on values fro input forms here action script - , before points out there no measures preventing sql injection yet:

<?php  require ('../../db_con.php');   $cat_id = $_post['cat_id']; $cat_name = $_post['cat_name']; $cat_color = $_post['cat_color']; $cat_icon = $_post['cat_icon'];  $q = "update cats set cat_name='cat_name', cat_color='cat_color', cat_icon='cat_icon'  cat_id='cat_id'";  if (mysqli_query($dbc, $q)) {     echo "record updated successfully"; } else {     echo "error updating record: " . mysqli_error($dbc); }  mysqli_close($dbc);  ?>

so reports me updated isn't updating table?

your query not have dynamic values in...

$q = "update cats set cat_name='$cat_name', cat_color='$cat_color', cat_icon='$cat_icon'  cat_id='$cat_id'";

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