Class Ingo_Script_Sieve_Test_Exists

The Ingo_Script_Sieve_Test_Exists class represents a test for the existence of one or more headers in a message.

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Ingo_Script_Sieve_Test_Exists

Package: Ingo
Author: Mike Cochrane mike@graftonhall.co.nz
Located at Script/Sieve/Test/Exists.php

Methods summary
`public`	# `__construct( array $vars = array() )` Constructor. Constructor. Parameters `$vars` Any required parameters.
`public boolean\|string`	# `check( )` Checks if the rule parameters are valid. Checks if the rule parameters are valid. Returns `boolean\|string` True if this rule is valid, an error message otherwise. Overrides `Ingo_Script_Sieve_Test::check()`
`public string`	# `toCode( )` Returns a script snippet representing this rule and any sub-rules. Returns a script snippet representing this rule and any sub-rules. Returns `string` A Sieve script snippet. Overrides `Ingo_Script_Sieve_Test::toCode()`

Methods inherited from Ingo_Script_Sieve_Test
`requires()`