file location: inc/_core/ui/forms/_form.class.php
object class: Form extends Widget
function: time_select
variable: $precision

If this form item is used it produces an error:

A non well formed numeric value encountered

Use context: used with defaults in a form: $Form->time_select( $field_name, $field_value, $precision = '5mn', $field_label, $field_note, $field_class, $field_onchange );

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