I can't get a record when using COUNT in php

Question

i have 2 tables like this

tbl_inbox
-SenderNumber
-Message

tbl_report
-Number
-Name
-Count

actually i want to show how many times these numbers appear in table count, i have try this code,but didn't show anything.
this my code :

$count = mysql_query("SELECT count(SenderNumber) as num FROM tbl_inbox WHERE SenderNumber = ".$data['Number']"");  
$result = mysql_fetch_assoc($count);  
$countresult = $result['num'];  

Answer 1

First of all your concatenation is incorrect, it should be

...WHERE SenderNumber = ".$data['Number']);

Secondly, instead of using count() you can use mysql_num_rows()

echo mysql_num_rows($count); //Returns row count

Note: mysql_() is deprecated, consider using mysqli_() or PDO instead

Answer 2

正确的SQL：

$count = mysql_query("SELECT count(SenderNumber) as num FROM tbl_inbox WHERE SenderNumber = ".$data['Number']);