php - 如何在php中删除文本末尾的“，”？

Question

我有一段文字：

"2G Network":"GSM 850","3G Network":"HSDPA 850",

如何在php中删除文本末尾的“，”

"2G Network":"GSM 850","3G Network":"HSDPA 850"

Answer 1

利用rtrim()

$str = rtrim($str, ',');

Answer 2

Substr()是你的朋友。

$noComma = substr('"2G Network":"GSM 850","3G Network":"HSDPA 850",', 0, -1);