PHP: Hypertext Preprocessor (original) (raw)

mysql_error

(PHP 4, PHP 5)

mysql_error — Returns the text of the error message from previous MySQL operation

Description

Returns the error text from the last MySQL function. Errors coming back from the MySQL database backend no longer issue warnings. Instead, use mysql_error() to retrieve the error text. Note that this function only returns the error text from the most recently executed MySQL function (not including mysql_error() andmysql_errno()), so if you want to use it, make sure you check the value before calling another MySQL function.

Parameters

link_identifier

The MySQL connection. If the link identifier is not specified, the last link opened bymysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() had been called with no arguments. If no connection is found or established, an**[E_WARNING](errorfunc.constants.php#constant.e-warning)** level error is generated.

Return Values

Returns the error text from the last MySQL function, or'' (empty string) if no error occurred.

Examples

Example #1 mysql_error() example

<?php <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>l</mi><mi>i</mi><mi>n</mi><mi>k</mi><mo>=</mo><mi>m</mi><mi>y</mi><mi>s</mi><mi>q</mi><msub><mi>l</mi><mi>c</mi></msub><mi>o</mi><mi>n</mi><mi>n</mi><mi>e</mi><mi>c</mi><mi>t</mi><mo stretchy="false">(</mo><mi mathvariant="normal">"</mi><mi>l</mi><mi>o</mi><mi>c</mi><mi>a</mi><mi>l</mi><mi>h</mi><mi>o</mi><mi>s</mi><mi>t</mi><mi mathvariant="normal">"</mi><mo separator="true">,</mo><mi mathvariant="normal">"</mi><mi>m</mi><mi>y</mi><mi>s</mi><mi>q</mi><msub><mi>l</mi><mi>u</mi></msub><mi>s</mi><mi>e</mi><mi>r</mi><mi mathvariant="normal">"</mi><mo separator="true">,</mo><mi mathvariant="normal">"</mi><mi>m</mi><mi>y</mi><mi>s</mi><mi>q</mi><msub><mi>l</mi><mi>p</mi></msub><mi>a</mi><mi>s</mi><mi>s</mi><mi>w</mi><mi>o</mi><mi>r</mi><mi>d</mi><mi mathvariant="normal">"</mi><mo stretchy="false">)</mo><mo separator="true">;</mo><mi>m</mi><mi>y</mi><mi>s</mi><mi>q</mi><msub><mi>l</mi><mi>s</mi></msub><mi>e</mi><mi>l</mi><mi>e</mi><mi>c</mi><msub><mi>t</mi><mi>d</mi></msub><mi>b</mi><mo stretchy="false">(</mo><mi mathvariant="normal">"</mi><mi>n</mi><mi>o</mi><mi>n</mi><mi>e</mi><mi>x</mi><mi>i</mi><mi>s</mi><mi>t</mi><mi>e</mi><mi>n</mi><mi>t</mi><mi>d</mi><mi>b</mi><mi mathvariant="normal">"</mi><mo separator="true">,</mo></mrow><annotation encoding="application/x-tex">link = mysql_connect("localhost", "mysql_user", "mysql_password");mysql_select_db("nonexistentdb", </annotation></semantics></math>link=mysqlconnect("localhost","mysqluser","mysqlpassword");mysqlselectdb("nonexistentdb",link); echo mysql_errno($link) . ": " . mysql_error($link). "\n";mysql_select_db("kossu", $link); mysql_query("SELECT * FROM nonexistenttable", $link); echo mysql_errno($link) . ": " . mysql_error($link) . "\n"; ?>

The above example will output something similar to:

1049: Unknown database 'nonexistentdb' 1146: Table 'kossu.nonexistenttable' doesn't exist

Found A Problem?

There are no user contributed notes for this page.