如何用php填充逗号分隔的字符串？

Question

I have a variable with the following value:
1,2,11,17,2
I need to convert it to:
SER1, SER2, SER11, SER17, SER2
In other words I need to pad to the left of each number the words SER
How to accomplish this with PHP?

Answer 1

You could use a regular expression to replace each number with SER prepended to the number: preg_replace('/(\d+)/', 'SER$1', '1,2,11,17,2');