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Add new Strings::substringReplace method

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- Add tests for the method
This commit is contained in:
Hypolite Petovan 2020-03-30 01:57:10 -04:00
parent 248a7fa48a
commit dcf59e34c1
2 changed files with 98 additions and 0 deletions
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38
src/Util/Strings.php
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@ -420,4 +420,42 @@ class Strings
return $pathItem;
}
/**
* Multi-byte safe implementation of substr_replace where $start and $length are character offset and count rather
* than byte offset and counts.
*
* Depends on mbstring, use default encoding.
*
* @param string $string
* @param string $replacement
* @param int $start
* @param int|null $length
* @return string
* @see substr_replace()
*/
public static function substringReplace(string $string, string $replacement, int $start, int $length = null)
{
$string_length = mb_strlen($string);
$length = $length ?? $string_length;
if ($start < 0) {
$start = max(0, $string_length + $start);
} else if ($start > $string_length) {
$start = $string_length;
}
if ($length < 0) {
$length = max(0, $string_length - $start + $length);
} else if ($length > $string_length) {
$length = $string_length;
}
if (($start + $length) > $string_length) {
$length = $string_length - $start;
}
return mb_substr($string, 0, $start) . $replacement . mb_substr($string, $start + $length, $string_length - $start - $length);
}
}