Question

我有一个php方法，它应该删除＆＃34;命令的所有出现。来自mysql查询字符串的mysql语句。

示例1：

STRING：SELECT * FROM table ORDER BY name

结果：SELECT * FROM table

示例2：

STRING：SELECT a.* FROM (SELECT * FROM table ORDER BY name, creation_date) AS a ORDER BY a.name

结果：SELECT a.* FROM (SELECT * FROM table) AS a

我现在的问题是：如何实现这个目标。

我尝试了以下内容：

if (stripos($sql, 'ORDER BY') !== false) {
    $sql = preg_replace('/\sORDER\ BY.+/i', '', $sql);
}

但这适用于示例1，但不适用于示例2

Answer 1

您可以使用的正则表达式为ORDER BY.*?(?=\s*LIMIT|\)|$)。

示例代码：

$re = "/ORDER BY.*?(?=\\s*LIMIT|\\)|$)/mi"; 
$str = "SELECT * FROM table ORDER BY name\n\nSELECT a.* FROM (SELECT * FROM table ORDER BY name, created_at) AS a ORDER BY a.name\n\nSELECT t0.* FROM table t0 WHERE t0.created_at IS NOT NULL ORDER BY t0.name, t0.created_at, t0.status LIMIT 10 OFFSET 10"; 
$result = preg_replace($re, "", $str);

Demo

Answer 2

ORDER BY.*?(?=\)|$)

试试这个。empty space。见。演示。

https://regex101.com/r/tJ2mW5/22

$re = "/ORDER BY.*?(?=\\)|$)/mi";
$str = "SELECT * FROM table ORDER BY name\nSELECT a.* FROM (SELECT * FROM table ORDER BY name, creation_date) AS a ORDER BY a.name";
$subst = "";

$result = preg_replace($re, $subst, $str);

Php正则表达式：从查询字符串中删除顺序

2 个答案: