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The HttpMessage class
PHP Manual

HttpMessage::setHttpVersion

(PECL pecl_http >= 0.10.0)

HttpMessage::setHttpVersion — Set HTTP version

Description

public bool HttpMessage::setHttpVersion ( string $version )

Set the HTTP Protocol version of the Message.

Parameters

version

the HTTP protocol version

Return Values

Returns TRUE on success, or FALSE if supplied version is out of range (1.0/1.1).

The HttpMessage class
PHP Manual