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Promote warnings to errors in substr_count() #4605

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5 changes: 3 additions & 2 deletions ext/standard/string.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5610,8 +5610,8 @@ PHP_FUNCTION(substr_count)
ZEND_PARSE_PARAMETERS_END();

if (needle_len == 0) {
php_error_docref(NULL, E_WARNING, "Empty substring");
RETURN_FALSE;
zend_throw_error(NULL, "Empty substring");
return;
}

p = haystack;
Expand All @@ -5632,6 +5632,7 @@ PHP_FUNCTION(substr_count)
length += (haystack_len - offset);
}
if (length < 0 || ((size_t)length > (haystack_len - offset))) {
/* TODO Check if Candidate to convert to Exception */
php_error_docref(NULL, E_WARNING, "Invalid length value");
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why is this warning not converted? invalid length is at least as serious as empty substring IMO.

RETURN_FALSE;
}
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26 changes: 17 additions & 9 deletions ext/standard/tests/strings/substr_count_basic.phpt
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Expand Up @@ -4,17 +4,25 @@ Test substr_count() function (basic)
<?php

echo "***Testing basic operations ***\n";
var_dump(@substr_count("", ""));
var_dump(@substr_count("a", ""));
var_dump(@substr_count("", "a"));
var_dump(@substr_count("", "a"));
var_dump(@substr_count("", chr(0)));
try {
substr_count("", "");
} catch (\Error $e) {
echo $e->getMessage() . "\n";
}
try {
substr_count("a", "");
} catch (\Error $e) {
echo $e->getMessage() . "\n";
}
var_dump(substr_count("", "a"));
var_dump(substr_count("", "a"));
var_dump(substr_count("", chr(0)));

$a = str_repeat("abcacba", 100);
var_dump(@substr_count($a, "bca"));
var_dump(substr_count($a, "bca"));

$a = str_repeat("abcacbabca", 100);
var_dump(@substr_count($a, "bca"));
var_dump(substr_count($a, "bca"));
var_dump(substr_count($a, "bca", 200));
var_dump(substr_count($a, "bca", 200, 50));
var_dump(substr_count($a, "bca", -200));
Expand All @@ -26,8 +34,8 @@ echo "Done\n";
?>
--EXPECT--
***Testing basic operations ***
bool(false)
bool(false)
Empty substring
Empty substring
int(0)
int(0)
int(0)
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