Insert a string in the middle of another string ?

Hi,


Does anyone know how to place a string into another string on a specified position ?
Like this for example:

$stringA = "testfile.jpg";


DO SOMETHING to insert '_new' in $stringA


$stringA = "testfile_new.jpg";

 

If it matters for inserting it in same string that have a 3 character extension(.jpg,.exe,.bmp etc) then following might be helpful

<?php
$stringA="filename.jpg";
$stringB="_new";
$length=strlen($stringA);
$temp1=substr($stringA,0,$length-4);
$temp2=substr($stringA,$length-4,$length);
echo $temp1.$stringB.$temp2;     // Displays  filename_new.jpg
?>

Code (markup):

 

$string = "picture.jpg";
$new = "_new";
$pos = ".jpg";
echo str_replace($pos, $new.$pos ,$string);

Code (markup):

 

// $insertstring - the string you want to insert
// $intostring - the string you want to insert it into
// $offset - the offset

function str_insert($insertstring, $intostring, $offset) {
   $part1 = substr($intostring, 0, $offset);
   $part2 = substr($intostring, $offset);
  
   $part1 = $part1 . $insertstring;
   $whole = $part1 . $part2;
   return $whole;
}

PHP:

 

boccio has given you a better solution, try his code

 

Problem with his function is that you always need to know how long the filename is, if he would do a reverse offset(from right to left) then you could just set offset to 4 always.

 

whats wrong with my solution? here as a function again:

function insertstring($string, $new, $pos) {
   return  str_replace($pos, $new.$pos ,$string);
}

Code (markup):

 

falcondriver is suggestion seems more useful then others.

 

That is fine, and works like it should, and can be kept constant without adjusting the offset like in the other one.

 

This thread solved a big problem for me...

Its really difficult to choose from which string function to use in PHP...
Lots of them.

 

Thanks guys

 

Use substr_replace.

 

This should work no matter what the file name/extension is or how long they are:

$fileName = 'filename.jpeg'; // or .gif, .jpg, etc..
$ext = '.' . end(explode('.', $fileName));
$newName = str_replace($ext, '_new' . $ext, $fileName);

PHP: