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PHP MySQLi: debug() function

mysqli_debug() function / mysqli::debug

The mysqli_debug() function / mysqli::debug is used to perform debugging operations.

Note: In order to use this function, you must compile the MySQL client library to support debugging.

Syntax:

Object oriented style

bool mysqli::debug ( string $message )

Procedural style

bool mysqli_debug ( string $message )

Usage: Procedural style

mysqli_debug(message);

Parameter:

Name Description Required/Optional
massage A string that represents the debugging operation to perform Required

Return value:

Returns TRUE.

Version: PHP 5, PHP 7

Example:

<?php
/* Create a trace file in '/tmp/client.trace' on the local (client) machine: */
mysqli_debug("d:t:o,/tmp/client.trace");
?>

See also

PHP Function Reference

Previous: connect
Next: dump_debug_info



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PHP: Tips of the Day

To use the constant simply use its name:

Example:

if (EARTH_IS_FLAT) {
 print "Earth is flat";
}
print APP_ENV_UPPERCASE; 

Output:


or if you don't know the name of the constant in advance, use the constant function:

// this code is equivalent to the above code
$const1 = "EARTH_IS_FLAT";
$const2 = "APP_ENV_UPPERCASE";
if (constant($const1)) {
 print "Earth is flat";
}
print constant($const2);

Output:


 





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