Fixup for precedence and some special syntax
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<?php
$a ** $b  *  $c;
$a  +  $b * $c;
$a * $b  +  $c;
$a  ?  $b  :  $c;
($a ** $b)  *  $c;
( $a ** $b )  *  $c;
!$a = $b;
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// Parens necessary
$stmts[0]->expr->left = new Expr\BinaryOp\Plus(new Expr\Variable('a'), new Expr\Variable('b'));
// The parens here are "correct", because add is left assoc
$stmts[1]->expr->right = new Expr\BinaryOp\Plus(new Expr\Variable('b'), new Expr\Variable('c'));
// No parens necessary
$stmts[2]->expr->left = new Expr\BinaryOp\Plus(new Expr\Variable('a'), new Expr\Variable('b'));
// Parens for RHS not strictly necessary due to assign speciality
$stmts[3]->expr->cond = new Expr\Assign(new Expr\Variable('a'), new Expr\Variable('b'));
$stmts[3]->expr->if = new Expr\Assign(new Expr\Variable('a'), new Expr\Variable('b'));
$stmts[3]->expr->else = new Expr\Assign(new Expr\Variable('a'), new Expr\Variable('b'));
// Already has parens
$stmts[4]->expr->left = new Expr\BinaryOp\Plus(new Expr\Variable('a'), new Expr\Variable('b'));
$stmts[5]->expr->left = new Expr\BinaryOp\Plus(new Expr\Variable('a'), new Expr\Variable('b'));
-----
<?php
($a + $b)  *  $c;
$a  +  ($b + $c);
$a + $b  +  $c;
($a = $b)  ?  $a = $b  :  ($a = $b);
($a + $b)  *  $c;
( $a + $b )  *  $c;
!$a = $b;
-----
<?php
foo ();
foo ();
$foo -> bar;
$foo -> bar;
$foo -> bar;
$foo -> bar;
$foo -> bar;
self :: $foo;
self :: $foo;
new Foo();
$x instanceof Foo;
Foo :: bar;
Foo :: $bar;
Foo :: bar();
Foo :: bar;
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$stmts[0]->expr->name = new Expr\Variable('a');
$stmts[1]->expr->name = new Expr\BinaryOp\Concat(new Expr\Variable('a'), new Expr\Variable('b'));
$stmts[2]->expr->var = new Expr\Variable('bar');
$stmts[3]->expr->var = new Expr\BinaryOp\Concat(new Expr\Variable('a'), new Expr\Variable('b'));
$stmts[4]->expr->name = new Node\Identifier('foo');
// In this case the braces are not strictly necessary. However, on PHP 5 they may be required
// depending on where the property fetch node itself occurs.
$stmts[5]->expr->name = new Expr\Variable('bar');
$stmts[6]->expr->name = new Expr\BinaryOp\Concat(new Expr\Variable('a'), new Expr\Variable('b'));
$stmts[7]->expr->name = new Node\VarLikeIdentifier('bar');
$stmts[8]->expr->name = new Expr\BinaryOp\Concat(new Expr\Variable('a'), new Expr\Variable('b'));
$stmts[9]->expr->class = new Scalar\String_('Foo');
$stmts[10]->expr->class = new Scalar\String_('Foo');
$stmts[11]->expr->class = new Expr\ConstFetch(new Node\Name('FOO'));
$stmts[12]->expr->class = new Expr\ConstFetch(new Node\Name('FOO'));
$stmts[13]->expr->class = new Expr\ConstFetch(new Node\Name('FOO'));
$stmts[14]->expr->name = new Expr\Variable('bar');
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<?php
$a ();
($a . $b) ();
$bar -> bar;
($a . $b) -> bar;
$foo -> foo;
$foo -> {$bar};
$foo -> {$a . $b};
self :: $bar;
self :: ${$a . $b};
new ('Foo')();
$x instanceof ('Foo');
(FOO) :: bar;
(FOO) :: $bar;
(FOO) :: bar();
Foo :: {$bar};