javascript - 将绳子分成相等的两半

Question

$string="p1234,p12,p12345,1234,12,12345,12,45678,334,q1255,q67889,q235";

我想将字符串拆分为两部分，但是可以在最后一次出现字符“p”时(即 p12345 之后)进行拆分 我将按照下面给出的方式分组

$str1=p1234,p12,p12345;
$str2=1234,12,12345;
 $str3=q1255,q67889,q235;

Answer 1

尝试一下:

$string = "p1234,p12,p12345,1234,12,12345";
$parts  = explode(',', $string);
$size   = count($parts);

$firsthalf  = implode(',', array_slice($parts, 0, $size / 2));
$secondhalf = implode(',', array_slice($parts, $size / 2));