删除多个逗号正则表达式 [英] Remove multiple commas regex

问题描述

有人可以让我知道如果在PHP中相邻的逗号会如何删除.

Can someone please let me know how I would remove multiple commas if they were next to one another in PHP.

$address= rtrim(preg_replace('!\s+!', ' ', $address_line_1.' '.$address_line_2.', '.$town_village_city.', '.$state_province_county.', '.$postal_code.', '.$country),',');
//return  preg_replace('/([!?,.])+/',' ',$address);
return  preg_replace('!\,+!',' ',$address);

例如，我可能有一个没有Town_village的地址，因此以多个逗号结尾.

For example I may have an address with no town_village so end up with multiple commas.

还有没有人有很好的资源来测试PHP正则表达式?

Also anyone good resources for testing PHP regex?

推荐答案

假定这些逗号之间没有空格，您可以简单地用一个逗号替换多个逗号:

assuming there are no spaces between these commas, you can simply replace multiple commas with one comma:

$cleadAddress = preg_replace('/,+/', ',', $address);

尽管您要用逗号(！)替换每个逗号，但是您也要替换多个逗号.是否值得尝试使用更复杂的正则表达式来节省一些执行时间，这取决于您的确切数据.

although you are replacing every comma with a comma (!), you also replace multiple commas. It depends on your exact data if a more complex regex is worth the effort to save some execution time.

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