str replace with array

Question

I m having some troubles with the PHP function str replace when using arrays   I have this message    message   strtolower  L rzzo rwldd ty esp mtdsza d szdepw ty esp opgtw d dple      And I am trying to use str replace like this    new message   str replace      array  l   m   n   o   p   q   r   s   t   u   v   w   x   y   z   a   b   c   d   e   f   g   h   i   j   k        array  a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z         message     The result should be A good glass in the bishop s hostel in the devil s seat  but instead  I get p voos vlpss xn twt qxswop s wosttl xn twt stvxl s stpt   However  when I only try replacing 2 letters it replaces them well    new message   str replace array  l   p    array  a   e     message     the letters l and p will be replaced by a and e   Why is it not working with the full alphabet array if they are both exactly the same size

User · Accepted Answer

str replace with arrays just performs all the replacements sequentially  Use strtr instead to do them all at once    new message   strtr  message   lmnopq       abcdef

User · Answer

Because str replace   replaces left to right  it might replace a previously inserted value when doing multiple replacements            Outputs F because A is replaced with B  then B is replaced with C  and so on           Finally E is replaced with F  because of left to right replacements       search    array  A    B    C    D    E         replace   array  B    C    D    E    F         subject    A       echo str replace  search   replace   subject

User · Answer

Easy and better than str replace    lt  php  arr   array       http       gt   http   www         w    gt   W        d    gt   D          word    http   desiweb ir       echo strtr  word  arr     gt    strtr PHP doc here

User · Answer

Alternatively to the answer marked as correct  if you have to replace words instead of chars you can do it with this piece of code     query    INSERT INTO my table VALUES                  values   Array  apple    oranges    mangos    papayas    foreach  array fill 0  count  values        as  key   gt   wildcard         query   substr replace  query       values  key       strpos  query   wildcard   strlen  wildcard      echo  query    Demo here   http   sandbox onlinephpfunctions com code 56de88aef7eece3d199d57a863974b84a7224fd7

User · Answer

If the text is a simple markup and has existing anchors  stage the existing anchor tags first  swap out the urls  then replace the staged markers    text     Lorem Ipsum is simply dummy text found by searching http   google com  q lorem in your  lt a href https   www mozilla org en-US firefox  gt Firefox lt  a gt    lt a href  https   www apple com safari   gt Safari lt  a gt   or https   www google com chrome  browser   Link replacements will first stage existing anchor tags  replace each with a marker  then swap out the remaining links  Links should be properly encoded   If links are not separated from surrounding content like a trailing     period then they it will be included in the link  Links that are not encoded properly may create a problem  so best to use this when you know the text you are processing is not mixed HTML   Example  http   google com i m complicate--d index html Example  https   www google com chrome  123 amp t 123 Example  http   google com  q    urlencode   lt a href  http   google com  gt http   google com lt  a gt              Replace existing links with a marker  linkStore   array     text   preg replace callback     lt a   a gt      function  match  use   amp  linkStore    key      linkStore  count  linkStore         linkStore  key     match 0   return  key      text       Replace remaining URLs with an anchor tag  text   preg replace callback    http https ftp ftps        a-zA-Z0-9 -       a-zA-Z  2 3     S       function  match  use   amp  linkStore   return   lt a href      match 0      gt     match 0     lt  a gt        text       Replace link markers with original  text   str replace array keys  linkStore   array values  linkStore    text    echo   lt pre gt    text

[php] str_replace with array

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