php - 在 codeigniter 中如何删除字符串中不需要的字符或符号

Question

当我使用 codeigniter php 运行 csv 导入时，我遇到了这个 mysql 错误

Reason for this error is that unwanted characters or symbols in the string.

这是我使用的 CodeIgniter 代码。

$this->db->where('designationName', $row[$ex_start + 3]);
$q = $this->db->get('designation');
if ($q->result()) {
$id = $q->result_array();
    $designation = $id[0]['iddesignation'];

} else {
    $data = array(
        'designationName' => $row[$ex_start + 3], //this is the variable that get string 
        'designationDate' => date('Y-m-d'),
        'status_idstatus' => '1'
    );
    $this->db->insert('designation', $data); //this is the point that error occurs
    $designation = $this->db->insert_id();

}

我如何避免这种字符或符号？

Answer 1

你可以做到

$data = array(
    'designationName' => preg_replace('/[^a-zA-Z0-9-_\.]/','', $row[$ex_start + 3])
    'designationDate' => date('Y-m-d'),
    'status_idstatus' => '1'
);

Note: This will allow plain text+numbers to save. No, any special chars will pass

---

编辑 01

如果你需要允许一些特殊字符(所有键盘字符)

 preg_replace('/[^A-Za-z0-9_~`\/@!$.%^#&*\\()+-=]/','', $row[$ex_start + 3])

---

或者您可以使用 Escaping Queries in codeigniter

1. $this->db->e​​scape()
2. $this->db->e​​scape_str()
3. $this->db->e​​scape_like_str()