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IMAP ConfigureOptions

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IMAP ConfigureOptionsNameDefaultChangeableChangelogimap.enable_insecure_rsh"0"INI_SYSTEMAvailable as of PHP 7.1.25, 7.2.13 and 7.3.0. Formerly, it was implicitly enabled. Constants

Runtime Runtime

Name	Default	Changeable	Changelog
imap.enable_insecure_rsh	"0"	`INI_SYSTEM`	Available as of PHP 7.1.25, 7.2.13 and 7.3.0. Formerly, it was implicitly enabled.

Constants

Title

imap.enable_insecure_rshbool: Establishing a connection to a server may invoke rsh or ssh commands, unless this Ini option is disabled.
Warning
Neither PHP nor the IMAP library filter mailbox names before passing them to rsh or ssh commands, thus passing untrusted data to this function without disabling this Ini option is insecure.

Source: reference/imap/ini.xml · from the official PHP manual (php/doc-en)