Using an array as needles in strpos

Question

How do you use the strpos for an array of needles when searching a string  For example    find letters   array  a    c    d     string    abcdefg    if strpos  string   find letters      false        echo  All the letters are found in the string        Because when using this  it wouldn t work  it would be good if there was something like this

User · Answer

str replace is considerably faster    find letters   array  a    c    d     string    abcdefg    match    str replace  find letters       string      string

User · Answer

With the following code    flag   true  foreach  find letters as  letter      if false   strpos  string   letter              flag   false           break          Then check the value of  flag  If it is true  all letters have been found  If not  it s false

User · Answer

This is my approach   Iterate over characters in the string until a match is found   On a larger array of needles this will outperform the accepted answer because it doesn t need to check every needle to determine that a match has been found   function strpos array  haystack   needles        offset   0        for   i    offset   len   strlen  haystack    i  lt   len   i             if  in array  haystack  i   needles                 return  i                      return false      I benchmarked this against the accepted answer and with an array of more than 7  needles this was dramatically faster

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If you just want to check if certain characters are actually in the string or not  use strtok    string    abcdefg   if  strtok  string   acd        string           not found   else          found

User · Answer

Reply to  binyamin and  Timo     not enough points to add a comment    but the result doesn t contain the position   The code below will return the actual position of the first element which is what strpos is intended to do   This is useful if you re expecting to find exactly 1 match    If you re expecting to find multiple matches  then position of first found may be meaningless   function strposa  haystack   needle   offset 0        if  is array  needle    needle   array  needle       foreach  needle as  query           res strpos  haystack   query   offset         if  res     false  return  res     stop on first true result           return false

User · Answer

I m writing a new answer which hopefully helps anyone looking for similar to what I am   This works in the case of  I have multiple needles and I m trying to use them to find a singled-out string   and this is the question I came across to find that        i   0       found   array        while   i  lt  count  needle              x   0          while   x  lt  count  haystack                 if  strpos  haystack  x    needle  i       false                    array push  found   haystack  x                               x                       i                found   array count values  found     The array  found will contain a list of all the matching needles  the item of the array with the highest count value will be the string s  you re looking for  you can get this with   print r array search max  found    found

User · Answer

Just an upgrade from above answers  function strsearch  findme   source       if is array  findme            if str replace  findme       source      source               return true                 else          if strpos  source  findme                return true                      return false

User · Answer

The question  is the provided example just an  example  or exact what you looking for  There are many mixed answers here  and I dont understand the complexibility of the accepted one   To find out if ANY content of the array of needles exists in the string  and quickly return true or false    string    abcdefg    if str replace array  a    c    d         string      string       echo  at least one of the needles where found        If  so  please give  Leon credit for that   To find out if ALL values of the array of needles exists in the string  as in this case  all three  a    b  and  c  MUST be present  like you mention as your  for example      echo  All the letters are found in the string      Many answers here is out of that context  but I doubt that the intension of the question as you marked as resolved  E g  The accepted answer is a needle of   array    array  burger    melon    cheese    milk      What if all those words MUST be found in the string   Then you try out some  not accepted answers  on this page

User · Answer

You can also try using strpbrk   for the negation  none of the letters have been found     find letters   array  a    c    d     string    abcdefg    if strpbrk  string  implode  find letters       false        echo  None of these letters are found in the string

User · Answer

lt  php  Words   array  quot hello quot   quot there quot   quot world quot     c   0        message    Hi hello        foreach   Words as  word            trial   stripos  message  word                    if  trial    true                c                echo  Word    c   didnt match  lt br gt   lt br gt             else               c                echo  Word    c   matched  lt br gt   lt br gt                   endforeach         gt   I used this kind of code to check for hello  It also Has a numbering feature  You can use this if you want to do content moderation practices in websites that need the user to type

User · Answer

You can try this     function in array strpos  word   array    foreach  array as  a        if  strpos  word  a      false            return true           return false

User · Answer

You can iterate through the array and set a  flag  value if strpos returns false    flag   false  foreach   find letters as  letter        if  strpos  string   letter      false                 flag   true            Then check the value of  flag

User · Answer

The below code not only shows how to do it  but also puts it in an easy to use function moving forward  It was written by  jesda    I found it online   PHP Code    lt  php    strpos that takes an array of values to match against a string    note the stupid argument order  to match strpos      function strpos arr  haystack   needle        if  is array  needle    needle   array  needle       foreach  needle as  what            if   pos   strpos  haystack   what     false  return  pos            return false      gt    Usage    needle   array  something   nothing     haystack    This is something   echo strpos arr  haystack   needle      Will echo True   haystack    This isn t anything   echo strpos arr  haystack   needle      Will echo False

User · Answer

Dave an updated snippet from http   www php net manual en function strpos php 107351  function strposa  haystack   needles array     offset 0             chr   array            foreach  needles as  needle                     res   strpos  haystack   needle   offset                   if   res     false   chr  needle     res                    if empty  chr   return false          return min  chr       How to use    string    Whis string contains word  cheese  and  tea      array    array  burger    melon    cheese    milk     if  strposa  string   array  1         echo  true     else       echo  false       will return true  because of array  cheese    Update  Improved code with stop when the first of the needles is found   function strposa  haystack   needle   offset 0        if  is array  needle    needle   array  needle       foreach  needle as  query            if strpos  haystack   query   offset      false  return true     stop on first true result           return false     string    Whis string contains word  cheese  and  tea      array    array  burger    melon    cheese    milk    var dump strposa  string   array       will return true  since  cheese  has been found

User · Answer

This expression searches for all letters   count array filter       array map  strpos   array fill 0  count  letters    str    letters    is int       count  letters

[php] Using an array as needles in strpos

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