<?php
echo dechex(741427361).PHP_EOL;
echo md5(741427361).PHP_EOL;
echo hexdec('2c3148a1').PHP_EOL;
$strings = array('1000000000', '3b9aca00', 'a4bcaee7d57e19735590b480feaebddb');
foreach ($strings as $testcase) {
if (ctype_xdigit($testcase)) {
echo "The string $testcase consists of all hexadecimal digits.\n";
} else {
echo "The string $testcase does not consist of all hexadecimal digits.\n";
}
}