PHP：使用 preg_split 分隔字母和数字答案

【问题标题】：PHP: Using preg_split to separate letters and numbersPHP：使用 preg_split 分隔字母和数字
【发布时间】：2018-09-04 09:02:53
【问题描述】：

在 PHP 上使用 preg_split，我想分隔字母和数字，而忽略其他（符号、制表符、空格等）。例如：

"A/BC 1"     => array("A","BC","1")
"A1-BCD/2"   => array("A","1","BCD","2")
"A1BC23-45"  => array("A","1","BC","23","45"), not array("A1BC23","45")
"ABC###123"  => array("ABC","123")
"AB+C^12/34" => array("AB","C","12","34")

必须写什么模式？

【问题讨论】：

How to separate letters and digits from a string in php的可能重复

标签： php regex

【解决方案1】：

$arr = [
"A/BC 1",
"A1-BCD/2",
"A1BC23-45",
"ABC***123",
"AB+C^12/34",
];
foreach ($arr as $ele) {
    preg_match_all('/[A-Z]+|\d+/', $ele, $m);
    print_r($m[0]);
}

输出：

Array
(
    [0] => A
    [1] => BC
    [2] => 1
)
Array
(
    [0] => A
    [1] => 1
    [2] => BCD
    [3] => 2
)
Array
(
    [0] => A
    [1] => 1
    [2] => BC
    [3] => 23
    [4] => 45
)
Array
(
    [0] => ABC
    [1] => 123
)
Array
(
    [0] => AB
    [1] => C
    [2] => 12
    [3] => 34
)

【讨论】：

所以，我必须使用 preg_match_all，而不是 preg_split？谢谢你。不好意思，我对PHP函数的了解不是很好。
@Mawan：用 preg_split 做同样的想法会复杂得多。

【解决方案2】：

    $str = "A/BC 1, A1-BCD/2, A1BC23-45, ABC***123, AB+C^12/34";
    $e = explode(',', $str);
    $arr = [];
    foreach ($e as $value){
        preg_match_all('/\w+/', $value, $matches);
        $s = '';
        foreach ($matches as $match){
            foreach ($match as $m){
                $s .= $m . " ";
            }
            $arr[] = $s;
        }

    }

    echo '<pre>';
    print_r($arr);

【讨论】：