Разделенная строка PHP до и после целого числа внутри

Вы можете использовать preg_match и группы захвата, чтобы правильно сопоставить строку.

https://3v4l.org/K1IK4

<?php

$string = "some address number 23 neighborhood city";

preg_match("/([^\d]*\d*)(.*)$/", $string, $matches);
var_dump($matches);

array(3) {
    [0]=>
    string(40) "some address number 23 neighborhood city"
    [1]=>
    string(20) "some address number 23"
    [2]=>
    string(18) " neighborhood city"
}

Обновлено:

В регулярном выражении мы хотим достичь того, чего хотим, с наименьшими возможными шагами.

Это наше регулярное выражение: https://regex101.com/r/rihbWM/2, и мы видим, что оно требует шагов 9, что неплохо.

1st Capturing Group ([^\d]\d)

Match a single character not present in the list below [^\d]* This is performance-wise better than .*\d because .*\d matches the whole string - then has to jump back to the decimal which is worse performance-wise.

• Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)

\d matches a digit (equal to [0-9])

\d* matches a digit (equal to [0-9])

• Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)

2nd Capturing Group (.*)

.* matches any character (except for line terminators)

• Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)

$ asserts position at the end of the string, or before the line terminator right at the end of the string (if any)

$example = preg_split('/(?<=\d\D)/', 'some address number 23 neighborhood city', 2);

var_dump($example);


array(2) {   
[0]=>   string(20) "some address number 23 "   
[1]=> string(20) "neighborhood city" }

Вы можете использовать preg_split () с флагами (PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY)

<?php
$word= "some address number 23 neighborhood city";
$keywords = preg_split("/(.+[0-9]+)(.+)/", $word,-1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
print_r($keywords);

Выход: -https://eval.in/1006421

Объяснение:-

/(.+[0-9]+)(.+)/

    1st Capturing Group (.+[0-9]+)

        .+ matches any character (except for line terminators)
            + Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)

        Match a single character present in the list below [0-9]+

            + Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
            0-9 a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)

    2nd Capturing Group (.+)
        .+ matches any character (except for line terminators)
        + Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)