我有一个标题为$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但我再次得到相同的数组。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($aRows); die;//It prints the same array again
谢谢。
简单地说：因为这就是foreach的工作方式。你得到一个数组的副本，你正在修改这个副本。原始数组不会更改，因为您没有对其执行任何操作。
如果要更改数组，可以执行以下操作：
foreach($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) {
$comment['url'] = 'http://stackoverflow.com'
}
具有相同的结果
这是因为$comment不是对原始数组元素的引用，而只是一个副本。您应该这样做：
foreach ($aRows as $i => $comment) {
...
$aRows[$i]['type_id'] = 'text';
...
}
让我们阅读手册
为了能够直接修改循环中的数组元素，前面$value &.在这种情况下，该值将通过引用分配。
执行此操作的不同方法是引用数组元素而不是复制：
foreach ($aRows as &$comment){
$comment['url'] = 'http://newurl.com';
}