数组中的PHP对象（如何：如果数组键为0，则返回0.否则，如果数组键为2，则返回2. BASIC LOGIC）

时间：2013-06-11 12:02:26

标签： php mysql arrays oop multidimensional-array

我正在尝试做什么：
以逗号分隔的单个字符串获取名称列表（如果有多个）：

  • Britney Spears, Lady Gaga, Miley Cyrus

发生了什么：

  • 我们在一个循环中。
  • 我正在尝试将这些celebrities与帖子ID
    • 相关联

所以我们为每个循环都有这个独特的$id ID 可附加多个名人名称。

查询： 

$array = $wpdb->get_results("SELECT name
FROM celebrities
WHERE id = " . $id . "");

PHP代码： 

if (is_array($array) && $array != null) {
    foreach($array as $single) {
        $array = $single->name . ',';
    }
}
else {
    $array = $array->name;
}

问题：

使用我的代码，我每个循环仅限于一个名人（即使数据库显示另一个名人也应该存在）。

我真的只想检查是否存在多个名人name，然后将它们放在由逗号分隔的单个字符串中。

期望输出：

以下是我正在努力实现的简单概述：

  • array(0) （没有名人） = // SHOW NOTHING
  • array(1) （找到一个名人姓名） = echo $name
  • array(2) （不止一位名人） = foreach($names as $name)

的var_dump：

我真的只是向您展示数组结构的复杂性：

array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1620 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(2) {
    [0] = >
        object(stdClass) #1683 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
[1] = >
    object(stdClass) #1611 (1) {
    ["name"]= >
    string(10)
"Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1614 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1690 (1) {
    ["name"]= >
        string(6)
    "Miley Cyrus"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1598 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(0) {}
array(4) {
    [0] = >
        object(stdClass) #1722 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
[1] = >
    object(stdClass) #1706 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
[2] = >
    object(stdClass) #1668 (1) {
    ["name"]= >
    string(10)
"Lady Gaga"
}
[3] = >
    object(stdClass) #1663 (1) {
    ["name"]= >
    string(10)
"Lady Gaga"
}
}
array(4) {
    [0] = >
        object(stdClass) #1615 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
[1] = >
    object(stdClass) #1708 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
[2] = >
    object(stdClass) #1723 (1) {
    ["name"]= >
    string(10)
"Lady Gaga"
}
[3] = >
    object(stdClass) #1726 (1) {
    ["name"]= >
    string(10)
"Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1598 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1663 (1) {
    ["name"]= >
        string(6)
    "Miley Cyrus"
}
}
array(1) {
    [0] = >
        object(stdClass) #1722 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1734 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1598 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1750 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1751 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1716 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1776 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1795 (1) {
    ["name"]= >
        string(6)
    "Miley Cyrus"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1647 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1784 (1) {
    ["name"]= >
        string(6)
    "Miley Cyrus"
}
}
array(1) {
    [0] = >
        object(stdClass) #1776 (1) {
    ["name"]= >
        string(6)
    "Miley Cyrus"
}
}
array(1) {
    [0] = >
        object(stdClass) #1611 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1676 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1781 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(0) {}
array(0) {}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1715 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1813 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1826 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1828 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1717 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1765 (1) {
    ["name"]= >
        string(6)
    "Miley Cyrus"
}
}
array(1) {
    [0] = >
        object(stdClass) #1769 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1848 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1690 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1660 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1821 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1717 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1766 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1836 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(0) {}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1765 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1826 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(0) {}
array(0) {}
array(0) {}
array(0) {}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1843 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(0) {}
array(2) {
    [0] = >
        object(stdClass) #1854 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
[1] = >
    object(stdClass) #1820 (1) {
    ["name"]= >
    string(5)
"Beyonce"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1814 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1847 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1866 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1820 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1814 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1847 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(2) {
    [0] = >
        object(stdClass) #1875 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
[1] = >
    object(stdClass) #1821 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1786 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1880 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1746 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1815 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1817 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1811 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1874 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1819 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1798 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1820 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1802 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1853 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1741 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1867 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1820 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(0) {}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1688 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1919 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(0) {}
array(0) {}
array(0) {}
array(0) {}
array(0) {}
array(0) {}
array(0) {}
array(0) {}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1889 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(2) {
    [0] = >
        object(stdClass) #1923 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
[1] = >
    object(stdClass) #1927 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(2) {
    [0] = >
        object(stdClass) #1811 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
[1] = >
    object(stdClass) #1904 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1910 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1889 (1) {
    ["name"]= >
        string(6)
    "Miley Cyrus"
}
}
array(1) {
    [0] = >
        object(stdClass) #1927 (1) {
    ["name"]= >
        string(6)
    "Miley Cyrus"
}
}
array(1) {
    [0] = >
        object(stdClass) #1904 (1) {
    ["name"]= >
        string(6)
    "Miley Cyrus"
}
}
array(1) {
    [0] = >
        object(stdClass) #1843 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1860 (1) {
    ["name"]= >
        string(6)
    "Miley Cyrus"
}
}
array(2) {
    [0] = >
        object(stdClass) #1889 (1) {
    ["name"]= >
        string(5)
    "Beyonce"
}
[1] = >
    object(stdClass) #1684 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1843 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(2) {
    [0] = >
        object(stdClass) #1811 (1) {
    ["name"]= >
        string(5)
    "Beyonce"
}
[1] = >
    object(stdClass) #1900 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(2) {
    [0] = >
        object(stdClass) #1904 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
[1] = >
    object(stdClass) #1926 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1915 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(2) {
    [0] = >
        object(stdClass) #1829 (1) {
    ["name"]= >
        string(5)
    "Beyonce"
}
[1] = >
    object(stdClass) #1932 (1) {
    ["name"]= >
    string(10)
"Lady Gaga"
}
}
array(0) {}
array(2) {
    [0] = >
        object(stdClass) #1889 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
[1] = >
    object(stdClass) #1952 (1) {
    ["name"]= >
    string(5)
"Beyonce"
}
}
array(0) {}
array(0) {}
array(2) {
    [0] = >
        object(stdClass) #1915 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
[1] = >
    object(stdClass) #1829 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1932 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1892 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(3) {
    [0] = >
        object(stdClass) #1899 (1) {
    ["name"]= >
        string(5)
    "Beyonce"
}
[1] = >
    object(stdClass) #1929 (1) {
    ["name"]= >
    string(5)
"Beyonce"
}
[2] = >
    object(stdClass) #1805 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1886 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1829 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1802 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(2) {
    [0] = >
        object(stdClass) #1932 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
[1] = >
    object(stdClass) #1941 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(0) {}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1836 (1) {
    ["name"]= >
        string(5)
    "Beyonce"
}
}
array(1) {
    [0] = >
        object(stdClass) #1947 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(2) {
    [0] = >
        object(stdClass) #1917 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
[1] = >
    object(stdClass) #1954 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1902 (1) {
    ["name"]= >
        string(5)
    "Beyonce"
}
}
array(1) {
    [0] = >
        object(stdClass) #1836 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(2) {
    [0] = >
        object(stdClass) #1970 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
[1] = >
    object(stdClass) #1842 (1) {
    ["name"]= >
    string(5)
"Beyonce"
}
}
array(0) {}
array(1) {
    [0] = >
        object(stdClass) #1878 (1) {
    ["name"]= >
        string(5)
    "Beyonce"
}
}
array(2) {
    [0] = >
        object(stdClass) #1802 (1) {
    ["name"]= >
        string(5)
    "Beyonce"
}
[1] = >
    object(stdClass) #1969 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1961 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(2) {
    [0] = >
        object(stdClass) #1836 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
[1] = >
    object(stdClass) #1970 (1) {
    ["name"]= >
    string(5)
"Beyonce"
}
}
array(1) {
    [0] = >
        object(stdClass) #1902 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
}
array(1) {
    [0] = >
        object(stdClass) #1979 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1860 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(1) {
    [0] = >
        object(stdClass) #1946 (1) {
    ["name"]= >
        string(6)
    "Madonna"
}
}
array(3) {
    [0] = >
        object(stdClass) #1926 (1) {
    ["name"]= >
        string(10)
    "Lady Gaga"
}
[1] = >
    object(stdClass) #1848 (1) {
    ["name"]= >
    string(5)
"Beyonce"
}
[2] = >
    object(stdClass) #1912 (1) {
    ["name"]= >
    string(6)
"Madonna"
}
}
array(0) {}

我相信我没有理由感到困惑，但我被困住了。

2 个答案:

答案 0 :(得分：0)

我认为问题在于：

foreach($array as $single) {
    $array = $single->name . ',';
}

$array只是一个数组，第一次循环执行时，在循环内部为你赋予一个新值。

请改为尝试：

$names = array();
foreach ($array as $single) {
    $names[] = $single->name;
}
echo implode(', ', $names);

答案 1 :(得分：0)

我同意Dale，因为在你的例子中，你总会得到一个名字（最后一个来自，例如，数据库），所以你应该在循环时把它放在一个不同的数组中

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