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[ticket/15403] Use substr over the fragment and not the whole text

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PHPBB-15403
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Ruben Calvo 2024-07-14 01:10:25 +02:00
parent 5f0e639b83
commit ec8bbf3da3
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1 changed files with 5 additions and 4 deletions
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9
phpBB/includes/functions_content.php
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@ -399,23 +399,24 @@ function get_context(string $text, array $words, int $length = 400): string
{ {
$fragment = utf8_substr($text, $start, $end - $start + 1); $fragment = utf8_substr($text, $start, $end - $start + 1);
$offset = $start; $fragment_start = 0;
$fragment_end = $end - $start + 1;
// Find the first valid alphanumeric character in the fragment to don't cut words // Find the first valid alphanumeric character in the fragment to don't cut words
if ($start > 0) if ($start > 0)
{ {
preg_match('/[^a-zA-Z0-9][a-zA-Z0-9]/u', $fragment, $matches, PREG_OFFSET_CAPTURE); preg_match('/[^a-zA-Z0-9][a-zA-Z0-9]/u', $fragment, $matches, PREG_OFFSET_CAPTURE);
$start = $offset + (int) $matches[0][1] + 1; // first valid alphanumeric character $fragment_start = (int) $matches[0][1] + 1; // first valid alphanumeric character
} }
// Find the last valid alphanumeric character in the fragment to don't cut words // Find the last valid alphanumeric character in the fragment to don't cut words
if ($end < $text_length - 1) if ($end < $text_length - 1)
{ {
preg_match_all('/[a-zA-Z0-9][^a-zA-Z0-9]/u', $fragment, $matches, PREG_OFFSET_CAPTURE); preg_match_all('/[a-zA-Z0-9][^a-zA-Z0-9]/u', $fragment, $matches, PREG_OFFSET_CAPTURE);
$end = $offset + end($matches[0])[1]; // last valid alphanumeric character $fragment_end = end($matches[0])[1]; // last valid alphanumeric character
} }
$output[] = utf8_substr($text, $start, $end - $start + 1); $output[] = utf8_substr($fragment, $fragment_start, $fragment_end - $fragment_start + 1);
} }
return htmlentities(implode(' ... ', $output)) . ($end < $text_length - 1 ? ' ...' : ''); return htmlentities(implode(' ... ', $output)) . ($end < $text_length - 1 ? ' ...' : '');