PHP怎么删除字符串中的指定字符，高手来帮忙看一下

Question

如题所述

Answer 1

删除第四个参数吗，示例代码：

<?php
$a='rgba(255,255,255,1) rgba(1,10,100,0.1) rgba(1,10,100,10.123) rgba(1,10,100,-123.001)';
$a=<a href="https://www.baidu.com/s?wd=preg_replace&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Ydn1PhrjbsuWf4uHFhnHbz0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EnHRknWDYrj61PW0Ln1bknWDsn0" target="_blank" class="baidu-highlight">preg_replace</a>('/,[0-9\.\-]*\)/',')',$a);
echo $a;
?>

执行结果：
rgba(255,255,255) rgba(1,10,100) rgba(1,10,100) rgba(1,10,100)