Extract a single unsigned integer from a string

Question

I want to extract the digits from a string that contains numbers and letters like   quot In My Cart   11 items quot   I want to extract the number 11

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This script creates a file at first   write numbers to a line and changes to a next line if gets a character other than number  At last  again it sorts out the numbers to a list   string1    hello my name 12 is after 198765436281094and14 and 124de  f  open  created file txt   w    for a in string1      if a in   1   2   3   4   5   6   7   8   9   0            f write a      else          f write   n   a    n   f close      desired numbers  x for x in open  created file txt      print desired numbers   k open  created file txt   r   desired numbers    for x in k      l x rstrip       print len l       if len l   15          desired numbers append l     desired numbers  x for x in k if len x   16  print desired numbers

User · Answer

Since there is only 1 numeric value to isolate in your string  I would endorse and personally use filter var   with FILTER SANITIZE NUMBER INT  echo filter var  string  FILTER SANITIZE NUMBER INT    A whackier technique which works because there is only 1 numeric value AND the only characters that come before the integer are alphanumeric  colon  or spaces is to use ltrim   with a character mask then cast the remaining string as an integer  Demo  string    quot In My Cart   11 items quot   echo  int ltrim  string   A  z         11   If for some reason there was more than one integer value and you wanted to grab the first one  then regex would be a direct technique  Demo echo preg match    d      string   m     m 0

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This functions will also handle the floating numbers   str    Doughnuts  4  doughnuts holes  0 08  glue  3 4    str   preg replace     0-9       -    str    str   preg replace     -             -    str    str   trim  str   -     arr   explode  -    str

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str    In My Cart   11 12 items   preg match all    d      str   matches   print r  matches

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An alternative solution with sscanf   str    quot In My Cart   11 items quot   list  count    sscanf  str   In My Cart    s items

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try this use preg replace   string    Hello  123 test this  456  done  100     int   intval preg replace     0-9           string   10   echo  int    DEMO

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other way unicode string even     res   array     str    test 1234 555 2 7 string       2 2 3 3    str   preg replace     0-9             str    str   trim preg replace    s  u         str     arr   explode       str   for   i   0   i  lt  count  arr    i          if  is numeric  arr  i               res      arr  i           print r  res     Array    0    gt  1234  1    gt  555  2    gt  2 7  3    gt  2 2  4    gt  3 3

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Follow this step it will convert string to number   value     0025 123    onlyNumeric   filter var  value  FILTER SANITIZE NUMBER FLOAT  FILTER FLAG ALLOW FRACTION   settype  onlyNumeric  float      result   onlyNumeric 100   echo  result    Another way to do it     res   preg replace     0-9            15645623 095605659

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Depending on your use case  this might also be an option    str    In My Cart   11 items    num        for   i   0   i  lt  strlen  str    i           if  is numeric  str  i               num     str  i            echo  num     11   Though I d agree a regex or filter var   would be more useful in the stated case

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Using preg replace   str    In My Cart   11 12 items    str   preg replace    D         str   echo  str

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value    25      Or   value    25 025      Or   value    I am numeric 25    onlyNumeric   filter var  value  FILTER SANITIZE NUMBER FLOAT  FILTER FLAG ALLOW FRACTION     This will return only the numeric value

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for utf8 str   function unicodeStrDigits  str         arr   array         sub           for   i   0   i  lt  strlen  str    i               if  is numeric  str  i                   sub     str  i               continue            else               if   sub                    array push  arr   sub                    sub                                          if   sub            array push  arr   sub               return  arr

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If you don t know which format the number is  int or floating  then use this      string     125 22     string2     125    preg match all     d    d      string  matches       matches 1    125 22  preg match all     d    d      string2  matches       matches 1    125

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For floating numbers   preg match all    d     d      string   match     Thanks for pointing out the mistake    mickmackusa

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preg replace     0-9          string     This should do better job

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preg match all    d      some string   matches    string of numbers   implode       matches 0      The first argument in implode in this specific case says  separate each element in matches 0  with a single space   Implode will not put a space  or whatever your first argument is  before the first number or after the last number   Something else to note is  matches 0  is where the array of matches  that match this regular expression  found are stored    For further clarification on what the other indexes in the array are for see  http   php net manual en function preg-match-all php

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I do not own the credit for this  but I just have to share it  This regex will get numbers from a string  including decimal points places  as well as commas         0-9      0-9        0-9        Cited from here  php - regex - how to extract a number with decimal  dot and comma  from a string  e g  1 120 01

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we can extract int from it like    string    In My Car Price   50660 00    echo intval preg replace     0-9         string       without number format   output  50660 echo number format intval preg replace     0-9         string        with number format  output  50 660   demo   http   sandbox onlinephpfunctions com code 82d58b5983e85a0022a99882c7d0de90825aa398

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Using preg replace    str     111  111-1111    str   preg replace    D         str   echo  str    Output  1111111111

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You can use preg match    s    In My Cart   11 items   preg match    d      s   m   var dump  m

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If you just want to filter everything other than the numbers out  the easiest is to use filter var    str    In My Cart   11 items    int    int  filter var  str  FILTER SANITIZE NUMBER INT

User · Answer

You can use following function     function extract numbers  string       preg match all      d        string   match       return  match 0

[php] Extract a single (unsigned) integer from a string

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