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Custom Fields are fields that can hold arbitrary extra information known as meta-data.
1
vote
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answer
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Set a maxlength for the title input in a custom post type
I'm creating a new custom post type. But I need to limit the max length for the title. This is how I'm creating the field in my code:
array(
'key' => 'title',
'label' => 'Title',
'name' => …