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ensure that the offset is part of the string

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This commit is contained in:
Christian Flothmann 2020-09-09 14:00:26 +02:00
parent 41cb27beb0
commit a6c046f3ab
1 changed files with 9 additions and 1 deletions
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10
src/Symfony/Component/String/UnicodeString.php
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@ -143,6 +143,10 @@ class UnicodeString extends AbstractUnicodeString
return null;
}
if ($this->length() <= $offset) {
return null;
}
$i = $this->ignoreCase ? grapheme_stripos($this->string, $needle, $offset) : grapheme_strpos($this->string, $needle, $offset);
return false === $i ? null : $i;
@ -235,7 +239,7 @@ class UnicodeString extends AbstractUnicodeString
$result = '';
$indexOf = $this->ignoreCase ? 'grapheme_stripos' : 'grapheme_strpos';
while (false !== $i = $indexOf($tail, $from)) {
while ('' !== $tail && false !== $i = $indexOf($tail, $from)) {
$slice = grapheme_substr($tail, 0, $i);
$result .= $slice.$to;
$tail = substr($tail, \strlen($slice) + \strlen($from));
@ -262,6 +266,10 @@ class UnicodeString extends AbstractUnicodeString
public function slice(int $start = 0, int $length = null): AbstractString
{
if ($this->length() <= $start) {
return new self();
}
$str = clone $this;
$str->string = (string) grapheme_substr($this->string, $start, $length ?? \PHP_INT_MAX);