PHP生成器简单实例

//Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32 bytes) in E:\php\test\index.php on line 5
range(1, 100000000);

function xrange($start, $limit, $step = 1) {
    for ($i = $start; $i <= $limit; $i += $step) {
        yield $i;
    }
}
 
foreach (xrange(1, 9, 1) as $number) {
    echo "$number ";
}