PHP 为每一项添加逗号，但最后一项
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PHP Add comma to every item but last one
提问by giodamelio
I have a loop like
我有一个循环
foreach ($_GET as $name => $value) {
echo "$value\n";
}
And I want to add a comma in between each item so it ends up like this.
我想在每个项目之间添加一个逗号，所以它最终是这样的。
var1, var2, var3
Since I am using foreachI have no way to tell what iteration number I am on.
由于我正在使用，foreach我无法知道我在使用什么迭代次数。
How could I do that?
我怎么能那样做？
采纳答案by giodamelio
Sorry I did not state my question properly. The awnser that worked for me is
抱歉，我没有正确说明我的问题。为我工作的 awnser 是
implode(', ', $_GET);
Thanks, giodamelio
谢谢，乔达梅利奥
回答by Yanick Rochon
Just build your output with your foreachand then implode that array and output the result :
只需使用您的输出构建您的输出，foreach然后内爆该数组并输出结果：
$out = array();
foreach ($_GET as $name => $value) {
array_push($out, "$name: $value");
}
echo implode(', ', $out);
回答by Richard Rodriguez
Like this:
像这样：
$total = count($_GET);
$i=0;
foreach ($_GET as $name => $value) {
$i++;
echo "$name: $value";
if ($i != $total) echo', ';
}
Explained: you find the total count of all values by count(). When running the foreach() loop, you count the iterations. Inside the loop you tell it to echo ', ' when the iteration isn't last (isn't equal to total count of all values).
解释：您可以通过 count() 找到所有值的总数。运行 foreach() 循环时，您计算迭代次数。在循环内，您告诉它在迭代未结束时回显 ', ' （不等于所有值的总数）。
回答by u476945
$comma_separated = implode(", ", $_GET);
echo $comma_separated;
you can use implode and achieve that
你可以使用内爆并实现
回答by Brent
You could also do it this way:
你也可以这样做：
$output = '';
foreach ($_GET as $name => $value) {
$output = $output."$name: $value, ";
}
$output = substr($output, 0, -2);
Which just makes one huge string that you can output. Different methods for different styles, really.
这只是制作一个可以输出的巨大字符串。不同的风格，不同的方法，真的。
回答by DA.
I'd typically do something like this (pseudo code):
我通常会做这样的事情（伪代码）：
myVar
for... {
myVar = i + ","
}
myVar = trimOffLastCharacter(myVar)
echo myVar
