php - Why is $x a undefined variable for switch statement? -


it display $x undefined. wrong switch statement?

http://localhost/add.php?price_error=1 switch(isset($_get['price_error']) && $_get['price_error'] == $x){ case 1: echo '<span class="error_msg">discount price cannot greater original price</span><br/>'; break; case 2: echo '<span class="error_msg">discount cannot less 30% of original price</span><br/>'; break; case 3: echo '<span class="error_msg">discount price , original price cannot greater $30000 hkd</span><br/>'; break; default: false; break; }

switches typically have variable parameters.

try: 

if(isset($_get['price_error']) && $_get['price_error'] == $x){ switch($x){ //code } }

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