预定义常量

下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。

VAR_REPRESENTATION_SINGLE_LINE (int)

var_representation() flag indicating that newlines should not be used for whitespace in variable representations.

VAR_REPRESENTATION_UNESCAPED (int)

var_representation() flag indicating that strings should be encoded as single quoted strings with unescaped control characters.