求助：如何按‘, {大写字母}’规则分割指定字符串为数组

Hey there! Let's break down how to split your target string exactly the way you want it. The core challenge here is splitting on the pattern comma + space + uppercase letter without losing the uppercase letter itself—and we can use PHP's regex-based string functions to nail this.

Step-by-Step Implementation #

We'll use preg_split() with a positive lookahead regex to target the right split points. Here's the code:

// Your original string
$originalString = "Training bench with two arm curlers, leg curler and barbell rack, Max. load: 160kg";

// Split using regex: match ", " followed by an uppercase letter (without consuming the letter)
$splitArray = preg_split('/, (?=[A-Z])/', $originalString);

// Output the result
print_r($splitArray);

What the Regex Does #

Let's break down the regex /, (?=[A-Z])/:

• , : Matches the literal comma and space that precedes the uppercase letter
• (?=[A-Z]): This is a positive lookahead—it checks that the next character is an uppercase letter (A-Z), but doesn't include that letter in the split separator. That's why the second array element keeps the "Max..." prefix intact.

Expected Output #

When you run the code, you'll get exactly the array you wanted:

Array
(
    [0] => Training bench with two arm curlers, leg curler and barbell rack
    [1] => Max. load: 160kg
)

Bonus: Handling Multiple Split Points #

This solution works even if your string has multiple instances of the , [A-Z] pattern. For example, if your string was:

"Item one, Item two, Big Item three, Tiny Item four"

It would split into 4 elements, each starting with the appropriate uppercase letter.

内容的提问来源于stack exchange，提问作者Zolky