te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>"Guard" operator like JavaScript in PHP - Stack Overflow

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"Guard" operator like JavaScript in PHP - Stack Overflow

programmeradmin2025-02-214浏览0评论

I like to do this in JavaScript:

function (a, b, c) {
    var foo = a || b || c;
    return foo.bar;
}

Is there a quick way to do assignment with fallback or does it require a custom function?

I like to do this in JavaScript:

function (a, b, c) {
    var foo = a || b || c;
    return foo.bar;
}

Is there a quick way to do assignment with fallback or does it require a custom function?

Share Improve this question edited Jul 22, 2011 at 7:26 pimvdb 155k80 gold badges311 silver badges356 bronze badges asked Jul 22, 2011 at 7:20 Kristopher Ives 6,0258 gold badges46 silver badges69 bronze badges

Add a ment |

1 Answer 1

Sorted by: Reset to default 21

PHP 5.3 introduces the ?: operator (not to be confused with the ternary conditional, go figure). I don't use PHP, but I imagine it'd be something like:

 $foo = $a ?: $b ?: $c

See: http://php/manual/en/language.operators.parison.php

Since PHP 5.3, it is possible to leave out the middle part of the ternary operator. Expression expr1 ?: expr3 returns expr1 if expr1 evaluates to TRUE, and expr3 otherwise.

Happy coding.

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