php多维数组重命名键不工作
我有一个多维数组,如下所示:php多维数组重命名键不工作,php,arrays,multidimensional-array,Php,Arrays,Multidimensional Array,我有一个多维数组,如下所示: Array ( [0] => Array ( [banner_link] => http://www.eclipse-pos.com/eclipse/images/small_banner2.jpg ) [1] => Array ( [banners] => 143038313801.jpg,143038313809.jpg,14
Array
(
[0] => Array
(
[banner_link] => http://www.eclipse-pos.com/eclipse/images/small_banner2.jpg
)
[1] => Array
(
[banners] => 143038313801.jpg,143038313809.jpg,143038313811.jpg
)
[2] => Array
(
[banners] => 143038306301.jpg,143038306302.jpg,143038306303.jpeg,143038306310.jpg,143038306311.jpg,143038306312.png
)
)
现在我想把banner_链接键重命名为banner
我试过使用下面的代码,但没有成功
foreach ( $getBefamousHomepage as $k=>$v )
{
$getBefamousHomepage[$k] ['banners'] = $getBefamousHomepage[$k] ['banner_link'];
unset($getBefamousHomepage[$k]['banner_link']);
}
获取此错误:
Notice: Undefined index: banner_link in /var/www/sitename/application/views/_templates/global_footer.php on line 14
Notice: Undefined index: banner_link in /var/www/sitename/application/views/_templates/global_footer.php on line 14
Array
(
[0] => Array
(
[banners] => http://www.eclipse-pos.com/eclipse/images/small_banner2.jpg
)
[1] => Array
(
[banners] =>
)
[2] => Array
(
[banners] =>
)
)
我做错了什么?你知道吗
谢谢。横幅链接并不总是存在。用于查看它是否存在
:
横幅链接并不总是存在。用于查看它是否存在
:
你的代码几乎不错。您只需要添加一个额外的检查来查看banner_链接是否存在。 如果没有,它会抛出一个通知,如您所见,但代码仍将执行,因此标题索引将设置为null 代码示例:
foreach ( $getBefamousHomepage as $k=>$v )
{
if (isset($getBefamousHomepage[$k]['banner_link']))
{
$getBefamousHomepage[$k] ['banners'] = $getBefamousHomepage[$k] ['banner_link'];
unset($getBefamousHomepage[$k]['banner_link']);
}
}
你的代码几乎不错。您只需要添加一个额外的检查来查看banner_链接是否存在。 如果没有,它会抛出一个通知,如您所见,但代码仍将执行,因此标题索引将设置为null 代码示例:
foreach ( $getBefamousHomepage as $k=>$v )
{
if (isset($getBefamousHomepage[$k]['banner_link']))
{
$getBefamousHomepage[$k] ['banners'] = $getBefamousHomepage[$k] ['banner_link'];
unset($getBefamousHomepage[$k]['banner_link']);
}
}
您应该检查横幅链接是否存在。
为了避免覆盖横幅,您应该检查横幅是否不存在
foreach ( $getBefamousHomepage as $k=>$v ) {
if(isset($getBefamousHomepage[$k]['banner_link']) && !isset($getBefamousHomepage[$k]['banners'])) {
$getBefamousHomepage[$k]['banners'] = $getBefamousHomepage[$k]['banner_link'];
unset($getBefamousHomepage[$k]['banner_link']);
}
}
您应该检查横幅链接是否存在。
为了避免覆盖横幅,您应该检查横幅是否不存在
foreach ( $getBefamousHomepage as $k=>$v ) {
if(isset($getBefamousHomepage[$k]['banner_link']) && !isset($getBefamousHomepage[$k]['banners'])) {
$getBefamousHomepage[$k]['banners'] = $getBefamousHomepage[$k]['banner_link'];
unset($getBefamousHomepage[$k]['banner_link']);
}
}
数组中的某些元素没有banner_链接,因此在您尝试访问它时会发出警告。请尝试以下方法:
if(isset($getBefamousHomepage[$k] ['banner_link'])) {
$getBefamousHomepage[$k] = array("banners" => $getBefamousHomepage[$k] ['banner_link']);
}
数组中的某些元素没有banner_链接,因此在您尝试访问它时会发出警告。请尝试以下方法:
if(isset($getBefamousHomepage[$k] ['banner_link'])) {
$getBefamousHomepage[$k] = array("banners" => $getBefamousHomepage[$k] ['banner_link']);
}
请将标题改为描述问题的一句话。这不是谷歌搜索。请将你的标题改为描述你的问题的一句话。这不是谷歌搜索,太棒了!。工作得很好。谢谢,好极了!。工作得很好。谢谢