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Php

Level:-Basic
Q(1) How can you enable error reporting in PHP?
A  ï¿½display_errors� is equal �on� in the php.ini.
B  ï¿½ini_set('display_errors', 1)� in your script.
C  include �error_reporting(E_ALL)� in your code
D  All of the above.
Q(2) What will be the output of the following PHP code ? 
    if (-100)
        print "hi" ;
    else
        print "how are u";
A   how are u
B   hi
C   Error
D   No output
Level:-Intermediate
Q(1) How can we register the variables into a session?
A  session_register ($ur_session_var)
B  session.register ($ur_session_var)
C  session_global ($ur_session_var)
D  session_define ($ur_session_var)
Q(2) What�s the difference between unset() and unlink()
A  unset() sets a variable to �undefined� while unlink() deletes a file we pass to it from the file system.
B  unset() deletes a file we pass to it from the file system while unlink() sets a variable to �undefined�
C  unset() sets a variable to �null� while unlink() deletes a file we pass to it from the file system.
D  unset() sets a variable to �undefined� while unlink() sets a variable to �null�.
Level:-Expert
Q(1) 
What will be the output of the following code?
function fn (&$var)
{
$var = $var - ($var/10*5);
return $var;
}
echo fn(100);
A   100
B   50
C   98
D   Error message
Q(2) What would be the output of following: 
$a = '1';
echo $b = &$a;
echo $c = "2$b";
A  0,0
B  0,20
C  1,21
D  0,2
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