PHP Requires Chilkat v11.1.0+

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

Chilkat2 PHP

<?php

use Chilkat2\JsonObject;
use Chilkat2\StringBuilder;

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

$sb = new StringBuilder();
$sb->Append($subject);

$json = new JsonObject();
$json->EmitCompact = false;

$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.
    echo $sb->LastErrorText, "\n";
    exit;
}

// Examine the matches:
echo $json->Emit(), "\n";

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

$sbTemp = new 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:
echo $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.
try {
    $sb->RegexReplace($json);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo "Result after doing replacements:\n";
echo $sb->GetAsString(), "\n";

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