$a = $b = $c = $d = array();
## ASSIGNING MULTIPLE VARIABLE IN PHP
$var1 = $var2 = $var3 = $var4 = "String";
$var1 = $var2 = $var3 = $var4 = 4;
$var1 = $var2 = $var3 = $var4 = {};
$var1 = $var2 = $var3 = $var4 = [];
$totalvariablename = $variablename * $othervariablename + ($othervariablename * 2);
$foo = $bar = $ping = $pong = '';
[$var1, $var2, $var3, $var4, $var5] = array(1, 2, 3, 4, 5);