Online PHP editor | refs for 5sd4L

<?php $map = explode(' ', 'oomktvziqtaovmmpxzoqrzsxlpwpgoj uDQEMISYnnVYnvyWRhHsDXnSCXAVVZj tZbknedErdpvAwQWpUiLqOxIqpafvXp dXoAVWcKppbEPuaqmXWjXJwRoRFOoEg pDiRUXlQjKJlslskVpGwtljGyVJPxHv bQsQNKxCsdYMdQPJiBmyrsuOrJQOtXg pMekeinUaMoDXqFzweLKipkBuggnsUv eQFYCJSKfBgHaJgZnZoWmOmAOJLVQHi hljrplajyKNXtwmfOjRwOqcqeeplyzy gkFOltsOyrPgIaerIaSjQQaVMyEhfyd vEaRHbBzfrcwJbCZmHdddLpuEJwspbt sXQGkwpKaTZmWJiZzpbkpHNiToawxKn wJpIKbGhnLjVAJNcxrqkKEJCKCOocSv mTRDNDpFtRUmcHoRELeSqXoGUIIsuYu ajeHaSVlQGLaEprSQarDzTomJdAWfqb zIJLHRBXMvNDegYeaoVRDuWBbdSBtLv xIeKdAYwajGHMgRLDGgDinBiLNBgatb kHepNsCQSJjTRmQrCHYWJqIPOVAUOer rvhmZfmogPglGNuLyAuSivBctlvVfzb qBJdHUkSaTArlgkhtHPyGhXOPkwmkBq rvbzZfwvLtTnhyXVHPlwsuGZQnNiNcm yCMtAVwYVgtZHVNznolGMBETIHFmoWj wfezbysbvOzsAhxSZFFAfOouyHldEYh gNHKKSFUtcUxfRyXHMugYBtAxBwDJZh rHmsozuNeoJqyzMDHsNbUDwzaNLtdxr bVmQMHyNndOWCZLnhrPxZXCYLDTWQre aSiEEJjZtoRpUzgsxsiiGzvnRpKLMrk qTzGCKvNhUhjrmCjAdwQAvkgqHyJZLm sSxzwjxAnWesTszIxirRwcWIXUPtwwa nTDEMTRGyhzdCtkTTDWbxdSjsNYlfXz eawtidzosgaofjxxyfcdoiulemirqap' ); $im = imagecreatetruecolor(31, 31); for ($i = 0; $i < 31; ++$i) { for ($j = 0; $j < 31; ++$j) { if (strtoupper($map[$i][$j]) === $map[$i][$j]) { imagesetpixel($im, $i, $j, imagecolorallocate($im, 0, 0, 0)); } else { imagesetpixel($im, $i, $j, imagecolorallocate($im, 255, 255, 255)); } } } header('Content-Type: image/png'); echo imagepng($im);