php PHP爆炸数组然后遍历值并输出到变量
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PHP explode array then loop through values and output to variable
提问by Marc Sanders
The string I am trying to split is $item['category_names']which for example contains Hair, Fashion, News
我试图拆分的字符串是$item['category_names']例如包含Hair, Fashion, News
I currently have the following code:
我目前有以下代码：
$cats = explode(", ", $item['category_names']);
foreach($cats as $cat) {
$categories = "<category>" . $cat . "</category>\n";
}
I want the outcome of $categoriesto be like the following so I can echo it out later somewhere.
我希望的结果$categories如下所示，以便我稍后可以在某个地方将其回显。
<category>Hair</category>\n
<category>Fashion</category>\n
<category>News</category>\n
Not sure if I am going the right way about this?
不确定我是否正确地解决了这个问题？
回答by Maxim Krizhanovsky
In your code you are overwritting the $categories variable in each iteration. The correct code would look like:
在您的代码中，您将在每次迭代中覆盖 $categories 变量。正确的代码如下所示：
$categories = '';
$cats = explode(",", $item['category_names']);
foreach($cats as $cat) {
$cat = trim($cat);
$categories .= "<category>" . $cat . "</category>\n";
}
update: as @Nanne suggested, explode only on ','
更新：正如@Nanne 建议的那样，只在“,”上爆炸
回答by Aaron W.
Without a for loop
没有 for 循环
$item['category_names'] = "Hair, Fashion, News";
$categories = "<category>".
implode("</category>\n<category>",
array_map('trim', explode(",", $item['category_names']))) .
"</category>\n";
echo $categories;
回答by divya sekar
PHP explode array by loopdemo: http://sandbox.onlinephpfunctions.com/code/086402c33678fe20c4fbae6f2f5c18e77cb3fbc2
PHP通过循环演示分解数组：http: //sandbox.onlinephpfunctions.com/code/086402c33678fe20c4fbae6f2f5c18e77cb3fbc2
its works for me
它对我有用
<?php
$str = "name:john,hone:12345,ebsite:www.23.com";
$array=explode(",",$str);
if(count($array)!=0)
{
foreach($array as $value)
{
$data=explode(":",$value);
echo $data[0]."=".$data[1];
echo ' ';
}
}
?>
回答by Wampie Driessen
if you use this:
如果你使用这个：
$cats = explode(", ", $item['category_names']);
foreach($cats as $cat) {
$categories = "<category>" . $cat . "</category>\n";
}
the $categories string is overwritten each time, so "hair" and "fasion" are lost..
$categories 字符串每次都会被覆盖，因此“头发”和“时尚”丢失了..
if you however add a dot before the equal sign in the for loop, like so:
但是，如果您在 for 循环中的等号前添加一个点，如下所示：
$cats = explode(", ", $item['category_names']);
foreach($cats as $cat) {
$categories .= "<category>" . $cat . "</category>\n";
}
the $catergories string will consist of all three values :)
$catergories 字符串将包含所有三个值:)
回答by AD7six
The error in your code is this:
您的代码中的错误是这样的：
$categories = "<category>" . $cat . "</category>\n";
You are overwriting $categoriesat each iteration, it should be:
您$categories在每次迭代时都覆盖，它应该是：
$categories .= "<category>" . $cat . "</category>\n";
Not sure if I am going the right way about this?
不确定我是否正确地解决了这个问题？
find and replace isn't what explode is for. If you just want to correct the code error - see above.
查找和替换不是爆炸的目的。如果您只想更正代码错误 - 请参见上文。
This is more efficient:
这是更有效的：
$categories = "<category>" .
str_replace(', ', "</category>\n<category>", $input) .
"</category>\n";
And this also accounts for variable whitespace:
这也说明了可变空格：
$categories = "<category>" .
preg_replace('@\s*,\s*@', "</category>\n<category>", $input) .
"</category>\n";
