How to write this if statement correctly? -Php Tutorial

How can I write this sentence if it is correct ?? If & nbsp; ($ _ GET [lx] & nbsp; 1): & nbsp; $ file_name & nbsp; $ r [titlepic]; else $ file_name & nbsp; $ r [picurl]; end & nbsp; how to write if this sentence is correct ?? How can I write this sentence if it is correct ??
If ($ _ GET ['lx '] = "1 "):
$ File_name = $ r ['titlepic '];
Else
$ File_name = $ r ['picurl'];
End if

How should I write this sentence correctly ??

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------ Solution --------------------

if ($_GET['lx'] == "1"): 
$file_name = $r['titlepic'];
else:
$file_name = $r['picurl'];
endif;

------ Solution --------------------

if..endif syntax
The `alternative' way to write if/elseif/else statements, using if(); elseif(); else; endif; cannot be efficiently implemented without adding a large amount of complexity to the 3.0 parser. Because of this, the syntax has been changed: Example E-5. Migration: old if..endif syntax

if ($foo);
    echo "yep\n";
elseif ($bar);
    echo "almost\n";
else;
    echo "nope\n";
endif;  
 
Example E-6. Migration: new if..endif syntax

if ($foo):
    echo "yep\n";
elseif ($bar):
    echo "almost\n";
else:
    echo "nope\n";
endif;  
 
Notice that the semicolons have been replaced by colons in all statements but the one terminating the expression (endif).