php 如何从数组中删除最后一个逗号（，）？
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How to remove last comma (,) from array?
提问by RockDance
I've gone through this address:
我已经通过这个地址：
Passing an array to a query using a WHERE clause
and found that if I use a join clause to separate values ,is also at the end of the array. How can I remove last?
并发现如果我使用 join 子句来分隔值,也是在数组的末尾。我怎样才能删除最后？
I am using like this
我是这样使用的
$ttst=array();
$ttst=array();
$tt = "SELECT frd_id FROM network WHERE mem_id='$userId'";
$appLdone = execute_query($tt, true, "select");
foreach($appLdone as $kk=>$applist){
$ttst[] = $applist['frd_id'];
}
$result = implode(',', $ttst);
then also coming last ,
然后也是最后一个，
Thanks.
谢谢。
but it doesn't give single quote to each value .
但它不会为每个值提供单引号。
回答by deceze
join(',', array_filter($galleries))
array_filtergets rid of empty elements that you seem to have. Of course, you should take care not to have empty elements in there in the first place.
array_filter摆脱你似乎拥有的空元素。当然，您首先应该注意不要在其中包含空元素。
回答by jensgram
回答by Shef
$str = "orange,banana,apple,";
$str = rtrim($str,',');
This will result in
这将导致
$str = "orange,banana,apple";
Update
更新
Based on your situation:
根据您的情况：
$result = implode(',', $ttst);
$result = rtrim($result,',');
回答by The Mask
$arr = array(...);
$last = end($arr);
unset($last);
回答by Mattis
If the trailing "," is an array element of itself, use array_pop(), else, use rtrim()
如果尾随的“,”是其自身的数组元素，则使用array_pop()，否则使用rtrim()
$array = array('one','two',3,',');
array_pop($array);
print_r($array);
Gives:
给出：
回答by Steward Godwin Jornsen
No need for length. Just take from beginning to the (last character - 1)
不需要长度。只需从开始到（最后一个字符 - 1）
$finalResult = $str = substr($result, 0, -1);
回答by Henrik Erlandsson
Use implode() instead! See Example #1 here http://php.net/manual/en/function.implode.php
使用 implode() 代替！请参阅此处的示例 #1 http://php.net/manual/en/function.implode.php
Edit:
编辑：
I think a quick fix would be (broken down in steps):
我认为一个快速的解决方法是（按步骤分解）：
$temp = rtrim(implode(',', $ttst), ','); //trim last comma caused by last empty value
$temp2 = "'"; //starting quote
$temp2 .= str_replace(",", "','", $temp); //quotes around commas
$temp2 .= "'"; //ending quote
$result = $temp2; // = 'apples','bananas','oranges'
This should give you single-quote around the strings, but notethat if some more values in the array are sometimes empty you will probably have to write a foreachloop and build the string.
这应该为您提供围绕字符串的单引号，但请注意，如果数组中的更多值有时为空，您可能必须编写一个foreach循环并构建字符串。
