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isset() and empty()
-----
<?php
isset($a);
isset($a, $b, $c);
empty($a);
empty(foo());
empty(array(1, 2, 3));
-----
array(
0: Expr_Isset(
vars: array(
0: Expr_Variable(
name: a
)
)
)
1: Expr_Isset(
vars: array(
0: Expr_Variable(
name: a
)
1: Expr_Variable(
name: b
)
2: Expr_Variable(
name: c
)
)
)
2: Expr_Empty(
expr: Expr_Variable(
name: a
)
)
3: Expr_Empty(
expr: Expr_FuncCall(
name: Name(
parts: array(
0: foo
)
)
args: array(
)
)
)
4: Expr_Empty(
expr: Expr_Array(
items: array(
0: Expr_ArrayItem(
key: null
value: Scalar_LNumber(
value: 1
)
byRef: false
)
1: Expr_ArrayItem(
key: null
value: Scalar_LNumber(
value: 2
)
byRef: false
)
2: Expr_ArrayItem(
key: null
value: Scalar_LNumber(
value: 3
)
byRef: false
)
)
)
)
)