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@ 2013-07-31T10:40:24Z

<?php

$lat = 90;
$lon = 180;
$zoom = 0;

$nLon = ($lon / 360) + 0.5;
$nLat = abs((asinh(tan(deg2rad($lat))) / M_PI / 2) - 0.5);

$scale = 1 << $zoom;

$tileX = (int)($nLon * $scale);
$tileY = (int)($nLat * $scale);

var_dump($tileX, $tileY);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
abs: documentation ( source)
tan: documentation ( source)
asinh: documentation ( source)
deg2rad: documentation ( source)

preferences:dark modelive preview

30.93 ms | 402 KiB | 5 Q