php 角度の度分秒を変换する

Posted 2021-05-05

<?php
$src = '135°38′53″';

$dmm = parse_dmm($src);
$deg = convert_dmm_to_deg($dmm['degrees'], $dmm['minutes'], $dmm['seconds']);
var_dump($deg); #=> double(135.64805555556)

function parse_dmm($dmm) {
	$matches = [];
	preg_match('/(\d+)°(\d+)′(\d+)″/', $dmm, $matches);
	return [
		'degrees' => $matches[1],
		'minutes' => $matches[2],
		'seconds' => $matches[3],
	];
}

function convert_dmm_to_deg($degrees, $minutes, $seconds) {
	return $degrees + $minutes / 60 + $seconds / 3600;
}