Question

How to find whether a variable is a resource in PHP

Answer 1

$con = @mysql_connect('localhost', 'root_user');
if (is_resource($con)) 
    echo '$con is a resource';
else
    die('connection error : ' . mysql_error());



/*
run: 

$con is a resource 

*/

 

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Answer 2

$fp = fopen('d:\\data.txt','r');  
if (is_resource($fp)) 
    echo '$fp is a resource';
else
    die('error open file');



/*
run: 

$fp is a resource 

*/

 

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