I want to check if a value for a MySQL Query contain %
character (can appear multiple times) but not the escaped \\%
.
So it should match:
'%test'
'%test\\%'
'test\\\\%'
- should match because it's escape the \\
not the %
'%test\\%%'
'\\%test%test\\%'
but not:
'test\\%'
'\\%test\\%'
'\\%test\\%test\\%'
I'm not good in Regular Expression, can someone help me on this?
Thanks in advance.
Edit :
I'm trying creating a PHP Library for generating SQL Query from an array, and maybe the generated query will be used mostly on MySQL.
So, the regex filtering process will be in PHP.
Sorry, I forgot to mention this.
Thanks
Assuming SQL Server, this should work:
WHERE
ColumnX LIKE '%[%]%' ESCAPE '\'
Though I'm not sure if it handles \\\\%
correctly.
This should work in any case:
WHERE
REPLACE(REPLACE(ColumnX, '\\', ''), '\%', '') LIKE '%[%]%'
Check this on PHP code:
unset($str1,$str2,$str3,$str4,$str5,$str6,$str7);
$str1 = '%100';
$str2 = '%100\%';
$str3 = "100\\\\%";
$str4 = "%100\\%%";
$str5 = '100\%';
$str6 = "100\\\\\\\\%";
$str7 = "100\\\\\\%";
$str8 = "100\\\\\\\\\\\\%";
$str9 = "100\\\\\\\\\\\\\\%";
$reg_exp= '/^%|[^\x5C]%|[^\x5C](\x5C\x5C)+%/';
echo $str1.' = '.preg_match($reg_exp, $str1).'<br />';
echo $str2.' = '.preg_match($reg_exp, $str2).'<br />';
echo $str3.' = '.preg_match($reg_exp, $str3).'<br />';
echo $str4.' = '.preg_match($reg_exp, $str4).'<br />';
echo $str5.' = '.preg_match($reg_exp, $str5).'<br />';
echo $str6.' = '.preg_match($reg_exp, $str6).'<br />';
echo $str7.' = '.preg_match($reg_exp, $str7).'<br />';
echo $str8.' = '.preg_match($reg_exp, $str8).'<br />';
echo $str9.' = '.preg_match($reg_exp, $str9).'<br />';
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.