bool empty ( mixed var ) returns true if its parameter has a false value : empty « Data Type « PHP

1. PHP
2. Data Type
3. empty

bool empty ( mixed var ) returns true if its parameter has a false value

 
$var1 = "0";
    $var2 = "1";
    $var3 = "";

    if (empty($var1)) print "Var1 empty\n";
    if (empty($var2)) print "Var2 empty\n";
    if (empty($var3)) print "Var3 empty\n";
    if (empty($var4)) print "Var4 empty\n";
  
  

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