Best Practices: How to check for a constant in an array using PHP? -

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I'm not sure how to do this. I have an object and I want to set this a 'type' property, but before I want to check it to make sure it's a valid type.

I was thinking that it is a good time to experiment, since the stable names, the constant will not change (nor do I want them). 

  // This is just a sample that I was thinking: Class Fobar {const TYPE_1 = 'Type 1'; Protected $ _types = array (auto :: TYPE_1); Public function settap ($ value) {// check is to ensure that the value is a valid type / I am thinking that it will accept // Foobar :: TYPE_1, 'TYPE_1', or 'type 1' // Should be able to flexibility but I do not know}} $ foobar = new Foobar (); $ Foobar- & gt; SetType ('TYPE_1'); // What should go here? (Best practice)

Update: I decided that I do not need to use constants in the first place, but I have accepted an answer I think if you have an array of all types, then $ _ types

/ code >, Then you can check directly what is the value in it: 

  class Foobar {const TYPE_1 = 'type 1'; ## Declare all available types as stable variables ## Do not forget to change it when new type will be protected static $ _types = array (self :: TYPE_1); Public function set type ($ value) {if (in_array ($ value, self :: $ _ types)) {// type is valid, we can use it} Other {// typed wrong, reporting error new exceptions ( "Wrong type [" $ value. "]"); }}}

But to ensure this type of array requires additional work that all types of types are in the array, along with it still therefore the only copy of the data will be used for all instances.


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