为什么在执行以下代码后数组没有被修改？
Why the array is not getting modified after executing following code?
我有一个名为 $aRows 的数组，如下所示：
Array
(
[0] => Array
(
[is_liked] =>
[comment_id] => 262
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1425364320
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => This is the long comment added to check thwe size of the comment on the device,if the size is more then add the hyperlink button to go on to the next page
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => March 3, 2015
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[1] => Array
(
[is_liked] =>
[comment_id] => 263
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1425365110
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => This comment is of two lines need to check more about it
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => March 3, 2015
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[2] => Array
(
[is_liked] =>
[comment_id] => 264
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1425365468
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => This comment is of two lines need to check more
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => March 3, 2015
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[3] => Array
(
[is_liked] =>
[comment_id] => 372
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426070317
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => Uploading Photo for comment <div title="comment_attach_image">
<a title="" title="colorbox" href="https://www.filepicker.io/api/file/CnYTVQdATAOQTkMxpAq4" ><img src="https://www.filepicker.io/api/file/CnYTVQdATAOQTkMxpAq4" height="150px" width="150px" /></a>
<a href="https://www.filepicker.io/api/file/CnYTVQdATAOQTkMxpAq4" class="comment_attach_image_link_dwl">Download</a>
</div>
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 21 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[4] => Array
(
[is_liked] =>
[comment_id] => 375
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426070656
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 106.79.139.101
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => test
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 21 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[5] => Array
(
[is_liked] =>
[comment_id] => 376
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426072374
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => Amit's pic<div class="comment_attach_image">
<a class="group1 cboxElement" href="http://52.1.47.143/file/attachment/2015/03/e55f0f3080eb9828270a7963648a5826.jpeg" ><img src="http://52.1.47.143/file/attachment/2015/03/e55f0f3080eb9828270a7963648a5826.jpeg" height="150px" width="150px" /></a>
<a class="comment_attach_image_link_dwl" href="http://52.1.47.143/feed/download/year_2015/month_03/file_e55f0f3080eb9828270a7963648a5826.jpeg" >Download</a>
</div>
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 20 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[6] => Array
(
[is_liked] =>
[comment_id] => 377
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426072419
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => PDF file added<div class="comment_attach_file">
<a class="comment_attach_file_link" href="http://52.1.47.143/feed/download/year_2015/month_03/file_1b87d4420c693f2bbdf738cbf2457d89.pdf" >1b87d4420c693f2bbdf738cbf2457d89.pdf</a>
<a class="comment_attach_file_link_dwl" href="http://52.1.47.143/feed/download/year_2015/month_03/file_1b87d4420c693f2bbdf738cbf2457d89.pdf" >Download</a>
</div>
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 20 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[7] => Array
(
[is_liked] =>
[comment_id] => 378
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426075869
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => Just did it...
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 20 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[8] => Array
(
[is_liked] =>
[comment_id] => 379
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426094874
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 117.200.213.90
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => Profile photo uploaded<div class="comment_attach_image">
<a class="group1 cboxElement" href="http://52.1.47.143/file/attachment/2015/03/a4ea5532b83a56bbbae2fffc80de4fee.png" ><img src="http://52.1.47.143/file/attachment/2015/03/a4ea5532b83a56bbbae2fffc80de4fee.png" height="150px" width="150px" /></a>
<a class="comment_attach_image_link_dwl" href="http://52.1.47.143/feed/download/year_2015/month_03/file_a4ea5532b83a56bbbae2fffc80de4fee.png" >Download</a>
</div>
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 14 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[9] => Array
(
[is_liked] =>
[comment_id] => 383
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426139915
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => Akki <div title="comment_attach_image">
<a title="" title="colorbox" href="https://www.filepicker.io/api/file/NJqijbKTIOA0ZJBNknsm" ><img src="https://www.filepicker.io/api/file/NJqijbKTIOA0ZJBNknsm" height="150px" width="150px" /></a>
<a href="https://www.filepicker.io/api/file/NJqijbKTIOA0ZJBNknsm" class="comment_attach_image_link_dwl">Download</a>
</div>
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 2 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
)
现在我已经编写了以下代码来操作数组 $aRows 但我又得到了相同的数组。为什么会这样？
foreach($aRows as $comment) {
$text = strstr($comment['text'], '<div');
if (strlen($text) <= 0) {
$comment['type_id'] = 'text';
$comment['url'] = '';
$comment['text'] = $comment['text'];
} else if($xml = @simplexml_load_string($text)) {
$comment['type_id'] = substr(strrchr($xml['class'], '_'), 1);
$comment['url'] = $xml->a['href']->asXML();
$comment['text'] = strtok($comment['text'], '<');
} else {
continue;
};
}
print_r($aRows); die;//It prints the same array again
谢谢。
简单地说：因为这就是 foreach 的工作原理。您获得数组的 copy，并且正在修改该副本。原始数组没有改变，因为你没有对它做任何事情。
如果你想改变数组，你可以这样做：
foreach($aRows as $key=>$comment) {
$aRows[$key]['url'] = '';
}
现在您正在更改原始数组。
正如@darbee 在评论中所说，您可以使用 & 在 foreach 中进行引用，如下所示：
foreach($aRows as &$comment) {
$comment['url'] = 'http://whosebug.com'
}
结果相同
那是因为 $comment 不是原始数组元素的 reference 而只是一个副本。你应该这样做：
foreach ($aRows as $i => $comment) {
...
$aRows[$i]['type_id'] = 'text';
...
}
让我们阅读manual
In order to be able to directly modify array elements within the loop precede $value with &. In that case the value will be assigned by reference.
不同的方法是引用数组元素而不是复制：
foreach ($aRows as &$comment){
$comment['url'] = 'http://newurl.com';
}
我有一个名为 $aRows 的数组，如下所示：
Array
(
[0] => Array
(
[is_liked] =>
[comment_id] => 262
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1425364320
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => This is the long comment added to check thwe size of the comment on the device,if the size is more then add the hyperlink button to go on to the next page
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => March 3, 2015
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[1] => Array
(
[is_liked] =>
[comment_id] => 263
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1425365110
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => This comment is of two lines need to check more about it
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => March 3, 2015
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[2] => Array
(
[is_liked] =>
[comment_id] => 264
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1425365468
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => This comment is of two lines need to check more
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => March 3, 2015
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[3] => Array
(
[is_liked] =>
[comment_id] => 372
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426070317
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => Uploading Photo for comment <div title="comment_attach_image">
<a title="" title="colorbox" href="https://www.filepicker.io/api/file/CnYTVQdATAOQTkMxpAq4" ><img src="https://www.filepicker.io/api/file/CnYTVQdATAOQTkMxpAq4" height="150px" width="150px" /></a>
<a href="https://www.filepicker.io/api/file/CnYTVQdATAOQTkMxpAq4" class="comment_attach_image_link_dwl">Download</a>
</div>
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 21 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[4] => Array
(
[is_liked] =>
[comment_id] => 375
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426070656
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 106.79.139.101
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => test
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 21 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[5] => Array
(
[is_liked] =>
[comment_id] => 376
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426072374
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => Amit's pic<div class="comment_attach_image">
<a class="group1 cboxElement" href="http://52.1.47.143/file/attachment/2015/03/e55f0f3080eb9828270a7963648a5826.jpeg" ><img src="http://52.1.47.143/file/attachment/2015/03/e55f0f3080eb9828270a7963648a5826.jpeg" height="150px" width="150px" /></a>
<a class="comment_attach_image_link_dwl" href="http://52.1.47.143/feed/download/year_2015/month_03/file_e55f0f3080eb9828270a7963648a5826.jpeg" >Download</a>
</div>
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 20 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[6] => Array
(
[is_liked] =>
[comment_id] => 377
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426072419
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => PDF file added<div class="comment_attach_file">
<a class="comment_attach_file_link" href="http://52.1.47.143/feed/download/year_2015/month_03/file_1b87d4420c693f2bbdf738cbf2457d89.pdf" >1b87d4420c693f2bbdf738cbf2457d89.pdf</a>
<a class="comment_attach_file_link_dwl" href="http://52.1.47.143/feed/download/year_2015/month_03/file_1b87d4420c693f2bbdf738cbf2457d89.pdf" >Download</a>
</div>
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 20 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[7] => Array
(
[is_liked] =>
[comment_id] => 378
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426075869
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => Just did it...
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 20 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[8] => Array
(
[is_liked] =>
[comment_id] => 379
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426094874
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 117.200.213.90
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => Profile photo uploaded<div class="comment_attach_image">
<a class="group1 cboxElement" href="http://52.1.47.143/file/attachment/2015/03/a4ea5532b83a56bbbae2fffc80de4fee.png" ><img src="http://52.1.47.143/file/attachment/2015/03/a4ea5532b83a56bbbae2fffc80de4fee.png" height="150px" width="150px" /></a>
<a class="comment_attach_image_link_dwl" href="http://52.1.47.143/feed/download/year_2015/month_03/file_a4ea5532b83a56bbbae2fffc80de4fee.png" >Download</a>
</div>
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 14 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
[9] => Array
(
[is_liked] =>
[comment_id] => 383
[parent_id] => 0
[type_id] => document
[item_id] => 160
[user_id] => 991
[owner_user_id] => 991
[time_stamp] => 1426139915
[update_time] => 0
[update_user] =>
[rating] =>
[ip_address] => 125.17.118.118
[author] => 1592
[author_email] =>
[author_url] =>
[view_id] => 0
[child_total] => 0
[total_like] => 0
[total_dislike] => 0
[text] => Akki <div title="comment_attach_image">
<a title="" title="colorbox" href="https://www.filepicker.io/api/file/NJqijbKTIOA0ZJBNknsm" ><img src="https://www.filepicker.io/api/file/NJqijbKTIOA0ZJBNknsm" height="150px" width="150px" /></a>
<a href="https://www.filepicker.io/api/file/NJqijbKTIOA0ZJBNknsm" class="comment_attach_image_link_dwl">Download</a>
</div>
[profile_page_id] => 0
[user_server_id] => 0
[user_name] => profile-991
[full_name] => disha shah
[gender] => 0
[user_image] =>
[is_invisible] => 0
[user_group_id] => 6
[language_id] =>
[post_convert_time] => 2 hours ago
[profile_image] => http://52.1.47.143/theme/frontend/foxplus/style/default/image/noimage/profile_50.png
)
)
现在我已经编写了以下代码来操作数组 $aRows 但我又得到了相同的数组。为什么会这样？
foreach($aRows as $comment) {
$text = strstr($comment['text'], '<div');
if (strlen($text) <= 0) {
$comment['type_id'] = 'text';
$comment['url'] = '';
$comment['text'] = $comment['text'];
} else if($xml = @simplexml_load_string($text)) {
$comment['type_id'] = substr(strrchr($xml['class'], '_'), 1);
$comment['url'] = $xml->a['href']->asXML();
$comment['text'] = strtok($comment['text'], '<');
} else {
continue;
};
}
print_r($aRows); die;//It prints the same array again
谢谢。
简单地说：因为这就是 foreach 的工作原理。您获得数组的 copy，并且正在修改该副本。原始数组没有改变，因为你没有对它做任何事情。
如果你想改变数组，你可以这样做：
foreach($aRows as $key=>$comment) {
$aRows[$key]['url'] = '';
}
现在您正在更改原始数组。
正如@darbee 在评论中所说，您可以使用 & 在 foreach 中进行引用，如下所示：
foreach($aRows as &$comment) {
$comment['url'] = 'http://whosebug.com'
}
结果相同
那是因为 $comment 不是原始数组元素的 reference 而只是一个副本。你应该这样做：
foreach ($aRows as $i => $comment) {
...
$aRows[$i]['type_id'] = 'text';
...
}
让我们阅读manual
In order to be able to directly modify array elements within the loop precede $value with &. In that case the value will be assigned by reference.
不同的方法是引用数组元素而不是复制：
foreach ($aRows as &$comment){
$comment['url'] = 'http://newurl.com';
}