[RESOLVED] How to replace segments of a string only once with str_replace.

god0fgod

If I'm using this code:

$input_words = array("yourself", "myself", "are you", "you are","you will", "you","i am","am i", "I", "were", "was", "my", "mine");
$bot_view = array("myself","yourself", "am I", "I am", "I will","me","you are","are you", "you", "was", "were", "your", "your's");

$converted_first_sentence = str_replace($input_words, $bot_view, $first_sentence);

How can I prevent a part of a string from being replaced more than one such as:

"are you" into "am I" into "are you". I can't think of a solution.

laserlight

[man]str_replace/man is designed to replace all occurrences. What you can do is use [man]strpos/man and [man]strlen/man with [man]substr_replace/man.

Weedpacket

[man]strtr[/man] can take an array of search/replace pairs, and run the string through the changes they specify; it only goes through the string once, so after a replacement has been made, it doesn't go back and replace the replacement.

god0fgod

laserlight wrote:
[man]str_replace/man is designed to replace all occurrences. What you can do is use [man]strpos/man and [man]strlen/man with [man]substr_replace/man.

Thanks. strstr doesn't work but I made this:

$input_words = array("yourself", "myself", "are you", "you are","you will", "you","i am","am i", "I", "were", "was", "my", "mine");
$bot_view = array("myself","yourself", "am I", "I am", "I will","me","you are","are you", "you", "was", "were", "your", "your's");

$converted_first_sentence = $first_sentence;
$string_complete = 0;
for($x = 0; $x <= 12; $x++){
       $pos = strpos($first_sentence,$input_words[$x]);
       if(($pos !== false) && ($pos >= $string_complete)){
                $input_word_len = strlen($input_words[$x]);
                $converted_first_sentence = substr_replace($converted_first_sentence,$bot_view[$x],$pos,$input_word_len);
                $bot_view_len = strlen($bot_view[$x]);
                $string_complete = $pos + $bot_view_len - 1;
       }
}