Error collection in PHP development, updated from time to time. _PHP Tutorial

Fatal error: Non-static method Conn::__construct() cannot be called statically in /file.php

There is no static method (this refers to the method parameter, string type) and cannot be referenced from the static context.

Fatal error: [] operator not supported for strings in /file.php

When a variable has been set to a non-array type, [] cannot be used again to add data to the variable with the same name. Key value
Solution: 1. Change the variable name, 2. Use $var = array(...)
Example:

Copy code The code is as follows:

//This is a string type
$err = $e->getMessage();

//When executed here, it will Error
$err[] = array
(
'gid' => $this->_get['id'],
'url' => $new,
'log' => $err,
'time' => time()
);

Fatal error: Declaration of Listing::content() must be compatible with that of InewsList::content() in fileList_1.php on line 7

All class methods of the unified interface must be consistent with the interface regulations: scope declaration, method name, number of parameters

Warning : mysqli::query() [mysqli.query]: Couldn't fetch Insert in /file.php

You must use the result set returned by mysqli to connect to the database to perform the operation.

Warning: 1064_You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near...

Online search is a MYSQL compatibility issue. In actual operation, it is a syntax error. You need to check whether the SQL statement is written correctly.

Warning: array_shift() expects parameter 1 to be array, integer given

The first parameter of the function must be an array.

#1366 - Incorrect integer value: '' for column 'ID' at row 1

The mysql version is msyql 5.1.14 WIN32 version. The reason for the error is that the auto-increment ID is not assigned a value. , although the previous version can automatically increase without assigning a value, but in the new version of msyql, it needs to be assigned a value of NULL

#1136: Column count doesn't match value count at row 1

Check whether there is a field with a serial number that increases automatically.
The stored data does not match the field type definition of the database table.
Whether the field type is correct, whether it is out of bounds, and whether one type of data is stored in another data type.

#1062_Duplicate entry '...' for key 'map'

The keyword is repeated, it may be the primary key ID, or it may be a unique field.

http://www.bkjia.com/PHPjc/322965.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/322965.htmlTechArticleFatal error: Non-static method Conn::__construct() cannot be called statically in /file.php No static method (this refers to method parameters, string type), cannot be retrieved from the static context...