[SOLVED] Replace Help

[paulman888888]

Hi,

 

I want  letter to be replaced with a number

eg

a -->> 1

b -->> 2

and so on.

 

Can anyone tell me how to do it please.

Thankyou very much

[Spaceman-Spiff]

You can use str_replace() function, or if you want to put number to all the alphabet letters, you can use ord() instead.

 

 

[moselkady]

try :

 

<?php
$a = ord('a')-1;
$letter = 'x';
echo ord($letter)-$a;
$letter = 'z';
echo ord($letter)-$a;
?>

[DarkWater]

$letters = range("a-z");

$numbers = range("1-26");

 

foreach ($letters as $k=>$v) {

      $newarr[] = $numbers[$k];

}

 

I think that'll work.  Didn't test it though.

[moselkady]

 

I will go with DarkWater's method 

[DarkWater]

And it'll work for any set of letters, by the way, if I change it up a bit.  Here:

 

$str = "There are some letters here!";

$letters = range("a-z");

$numbers = range("1-26");

$str = str_split("", $str);

array_walk($str, 'strtolower'):

foreach ($str as $k=>$v) {

    $pos = array_search($v, $letters);

    $newarr[] = $numbers[$pos];

}

$newstr = implode("", $newarr);

echo $newstr;

   

[DarkWater]

function remove_nonalpha($str) {

  $let = range('a-z');

  $str = strtolower($str);

  if (!in_array($str, $let)) {

    return NULL;

  }

  return $str;

}

$str = "There are some letters here!";

 

$str = str_replace($bad, "", $str);

$letters = range("a-z");

$numbers = range("1-26");

$str = str_split("", $str);

array_walk($str, 'remove_nonalpha'):

foreach ($str as $k=>$v) {

    $pos = array_search($v, $letters);

    $newarr[] = $numbers[$pos];

}

$newstr = implode("", $newarr);

echo $newstr;

 

 

Fixed it to remove non-letter characters.

[DarkWater]

Rewritten a 3rd time to let any numbers you currently have in there to stay AND to not recreate a $let array every time (saves resources).  You can remove the number thing if you want.

function remove_nonalpha($str, $key, $let = "") {
   if (!isset($let)) {
       $let = range("a-z");
   }
   $str = strtolower($str);
   if (!in_array($str, $let) || !is_numeric($str)) {
     return NULL;
   }
   return $str;
}
$str = "There are some letters here!";

$str = str_replace($bad, "", $str);
$letters = range("a-z");
$numbers = range("1-26");
$str = str_split("", $str);
array_walk($str, 'remove_nonalpha', $letters):
foreach ($str as $k=>$v) {
    $pos = array_search($v, $letters);
    $newarr[] = $numbers[$pos];
}
$newstr = implode("", $newarr);
echo $newstr; 

[paulman888888]

thank you very much