# 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。

`EXP_GLOB` (int)
  Indicates that the pattern is a glob-style string pattern.
`EXP_EXACT` (int)
  Indicates that the pattern is an exact string.
`EXP_REGEXP` (int)
  Indicates that the pattern is a regexp-style string pattern.
`EXP_EOF` (int)
  Value, returned by expect_expectl(), when EOF is reached.
`EXP_TIMEOUT` (int)
  Value, returned by expect_expectl() upon timeout of seconds, specified in value of expect.timeout
`EXP_FULLBUFFER` (int)
  Value, returned by expect_expectl() if no pattern have been matched.

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