Tribe__Validate::number_or_percent()
validates a field as being a number or a percentage
Source
File: src/Tribe/Validate.php
public function number_or_percent() {
if ( preg_match( '/^[0-9]+%{0,1}$/', $this->value ) ) {
$this->result->valid = true;
} else {
$this->result->valid = false;
$this->result->error = sprintf( esc_html__( '%s must be a number or percentage.', 'tribe-common' ), $this->label );
}
}