PHP ActiveX

Regular Expression Replace Full Matches

See more Regular Expressions Examples

Demonstrates replacing the full matches of a regular expression.

Note: Chilkat uses PCRE2. See PCRE2 Regular Expressions
Also see: PCRE2 Performance

PHP ActiveX

<?php

$success = 0;

$success = 0;

$subject = 'John Anders, +_+_+ Mary Robins $$$$';
$pattern = '\\w+\\s+\\w+';

$sb = new COM("Chilkat.StringBuilder");
$sb->Append($subject);

$json = new COM("Chilkat.JsonObject");
$json->EmitCompact = 0;

$timeoutMs = 2000;
$numMatches = $sb->RegexMatch($pattern,$json,$timeoutMs);
if ($numMatches < 0) {
    // Probably an error in the regular expression.
    // Suggestion: Use AI to help create and/or diagnose regular expressions.
    print $sb->LastErrorText . "\n";
    exit;
}

// Examine the matches:
print $json->emit() . "\n";

// {
//   "match": [
//     {
//       "group": [
//         {
//           "cap": "John Anders",
//           "idx": 0,
//           "len": 11
//         }
//       ]
//     },
//     {
//       "group": [
//         {
//           "cap": "Mary Robins",
//           "idx": 19,
//           "len": 11
//         }
//       ]
//     }
//   ]
// }

$sbTemp = new COM("Chilkat.StringBuilder");

$i = 0;
$numMatches = $json->SizeOfArray('match');
while ($i < $numMatches) {

    $json->I = $i;

    // The full match is always in group 0.
    $sbTemp->Clear();
    $json->StringOfSb('match[i].group[0].cap',$sbTemp);

    // Indicate that we wish to replace the full match with it's value converted to uppercase.
    $sbTemp->ToUppercase();
    $json->UpdateSb('match[i].group[0].rep',$sbTemp);

    $i = $i + 1;
}

// The JSON now has replacement strings:
print $json->emit() . "\n";

// {
//   "match": [
//     {
//       "group": [
//         {
//           "cap": "John Anders",
//           "idx": 0,
//           "len": 11,
//           "rep": "JOHN ANDERS"
//         }
//       ]
//     },
//     {
//       "group": [
//         {
//           "cap": "Mary Robins",
//           "idx": 19,
//           "len": 11,
//           "rep": "MARY ROBINS"
//         }
//       ]
//     }
//   ]
// }

// Call RegexReplace to update the StringBuilder with the replacements.
$success = $sb->RegexReplace($json);
if ($success == 0) {
    print $sb->LastErrorText . "\n";
    exit;
}

print 'Result after doing replacements:' . "\n";
print $sb->getAsString() . "\n";

// Result after doing replacements:
// JOHN ANDERS, +_+_+ MARY ROBINS $$$$

?>