There is a string that contains numbers, - , spaces between them, and cm : $string = 50 — 55 см

Numbers may be different.

How to delete everything and leave only the last number: 55 . Without letters, without spaces and dashes?

Tried using preg_replace('/см/','',$string); but so i will remove only см

Closed due to the fact that off-topic participants Wiktor Stribiżew , Dmitry Kozlov , Edward , aleksandr barakin , freim March 7 at 17:50 .

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    4 answers 4

     $string = '50 — 55 см'; echo preg_replace('/^.*?\b(\d+)\hсм$/m', '$1', $string); 
       preg_match_all('/\d+/', '50 — 55 см', $matches); echo end($matches[0]);

      The regular expression: /\d+/ will select all the substrings in which one or more (quantifier + ), digit ( \d ) is found, and all other characters will be ignored.

      All matches are placed in the $matches[0] array. The end() function will return the last element of the array, the number 55.

      • 2
        The necessary element can be obtained without the help of additional functions, if the template is correctly written: ~(\d+)\hсм$\K~ - Edward

      Made awry, mb there are better options:

       if(preg_match('/см/i',$string)){ $newvalue = strpos($string,"—"); //находим позицию символа $string = trim(substr($string,0,$newvalue)); //делим по треб. символу и удаляем возможные пробелы }

        As an option:

         $string = '50 — 55 см'; $num = preg_replace('/.*\D+(\d+)\D+$/i', '$1', $string);