Dynamically Replace Substring With Substring Using randomly PHP [duplicate]

Question

I found this on SO, Dynamically Replace Substring With Substring Using PHP

I need something similar to this, don't want to remove first part but randomly both.

that means, I need sometimes it would get first part of the substring, and sometimes last part.

function deleteStringBetweenStrings($start, $end, $string) {
// create a pattern from the input and make it safe to use in a regular expression
$pattern = '|' . preg_quote($start) . '(.*)' . preg_quote($end) . '|U';
// replace every occurrence of this pattern with an empty string in full $s

tring
    return preg_replace($pattern, '', $string);
}


$String = "loads of text [[gibberish text|Text i Want]] more text  [[gibberish text|Text i Want]] more text [[if no separator then  just remove tags]]";

$String = deleteStringBetweenStrings("[[", "]]", $String);
echo $String;
//loads of text more text more text

If I use this function with '[[' and ']]' delimiters, this removes full substring inside the delimiters. but I need that string should contain any one part (random) of the substring inside the delimiters. My expected result would be like-

result #1 = loads of text gibberish text more text Text i Want more text if no separator then just remove tags

result #2 = loads of text Text i Want more text Text i Want more text if no separator then just remove tags

result #3 = loads of text Text i Want more text gibberish text more text if no separator then just remove tags

any assistance would be greatly appreciated.

You must use preg_quote($start, '|') and preg_quote($end, '|'). This is because you chose | as a delimiter. As in the accepted answer: If the optional delimiter is specified, it will also be escaped. This is useful for escaping the delimiter that is required by the PCRE functions. The / is the most commonly used delimiter. — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Nov 16, 2018 at 16:22
If I do that, the result goes like this loads of text Text i Want]] more text [[if no separator then just remove tags]] — Ashley queen
– Ashley queen, Commented Nov 16, 2018 at 16:25
I'm new in here, may be I need to use $String = deleteStringBetweenStrings("[[", "]]", $String); that means '[[' and ']]' as delimiter, and vertical bar would be separator. — Ashley queen
– Ashley queen, Commented Nov 16, 2018 at 16:31
Try $pattern = '|' . preg_quote($start, '|') . '(?:(?!' .preg_quote($start, '|') . ').)*?' . preg_quote($end, '|') . '|'; — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Nov 16, 2018 at 16:37

Ashley queen · Accepted Answer · 2018-11-17 08:53:00Z

With help of @WiktorStribiżew, I've managed it this way. it gives me result what I wanted with 1 separator, if it have more than one separator, 3rd part remain intact. It would be great if anyone help me to get ride of 3rd part. thanks every one.

function getSubstrings($start, $end, $string) {
    // create a pattern from the input and make it safe to use in a regular expression
    $pattern = '|' . preg_quote($start) . '(.*)' . preg_quote($end) . '|U';
    // replace every occurrence of this pattern with an empty string in full $string
    return preg_replace($pattern, '', $string);
}

function clearString($string) {
    // to remove '[]|' these, called str_replace($shortCode, $codeReplace, $string)
    $shortCode = array( "[", "]", '|');
    $codeReplace = array('', '', '');
    // initiating $StringBetweenStrings
    $StringBetweenStrings = '';
    // creates an array of [ and |
    $dl = array("[", '|');
    // randomly, calling one of the array
    $dl_before = $dl[array_rand($dl)];

    // checking if $dl_before is '[' or '|', if it's '|' then create $dl_after ']', else that would be '|'
    $dl_after =  ($dl_before=='|') ? ']' : '|';

    // split string with preg_split
    $res_array = preg_split('~(\[\[[^][|]*\|[^][]*]])~', $string, -1, PREG_SPLIT_DELIM_CAPTURE);

    foreach ($res_array as $key => $value) {
      // calling getSubstrings to get first part or last part of substring & calling str_replace to remove delimiter and separator.
      $StringBetweenStrings .= str_replace($shortCode, $codeReplace , getSubstrings($dl_before, $dl_after, $value));
    }

// return expected string
    return $StringBetweenStrings;
}

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