All posts by Pramod T P

Solutions Architect / Engineering Manager - eCommerce
PHP

restore_exception_handler

It r restores the previous exception handler

Example

<?php

function customError($errno, $errstr, $errfile, $errline)  {
echo $errno.””.$errstr.” , File name – “.$errfile.” at line No”.$errline;
}

set_error_handler(“customError”);

$val=5;

if ($val>1)  trigger_error(“An error occured”);

restore_error_handler();

if ($val>5)  trigger_error(“An error occured”);

?>

Output

exception_handler_1 – This triggers the first exception handler…

PHP

restore_error_handler

It restores the previous error handler

Example

<?php

function customError($errno, $errstr, $errfile, $errline)  {
echo $errno.””.$errstr.” , File name – “.$errfile.” at line No”.$errline;
}

set_error_handler(“customError”);

$val=5;

if ($val>1)  trigger_error(“An error occured”);

restore_error_handler();

if ($val>5)  trigger_error(“An error occured”);

?>

Output

1024An error occured , File name – /var/www/test/date/date.php at line No11

PHP

error_reporting

It specifies which errors are occurred.

Example

<?php
error_reporting(E_ALL);
?>

E_ERROR ,E_WARNING,E_PARSE,E_NOTICE,E_CORE_ERROR,E_CORE_WARNING ,E_COMPILE_ERROR,E_COMPILE_WARNING,E_USER_ERROR,E_USER_WARNING,E_USER_NOTICE,E_STRICT ,E_RECOVERABLE_ERROR,E_ALL

Output

It shows all the errors occurred including waring,notice etc

PHP

error_log

It sends an error to the server error-log
Example

<?php
$value=2;
if ($value>1){
error_log(“An error occured”,1,”info@phpcodez.com”,”From: from@phpcodez.com”);
}
?>

Output
Error  message will be sent to the given  email address
PHP

debug_backtrace

It generate a generates a backtrace and displays data from the code that led up to the debug_backtrace() function.
Example

<?php
echo “<pre>”;
function back($arg1, $arg2) {
print_r(debug_backtrace());
}
back(“test1”, “test2”);
?>

The possible elements that can be returned are given below

function,line,file,class,object,type,Returns: “->” ,Returns: “::” ,Returns nothing,args

Output

Array
(
[0] => Array
(
[file] => /var/www/test/index.php
[line] => 6
[function] => back
[args] => Array
(
[0] => Peter
[1] => Griffin
)

)

)

general

Julian day

Julian day is used in the Julian date (JD) system of time measurement for scientific use by the astronomy community, presenting the interval of time in days and fractions of a day since January 1, 4713 BC Greenwich noon. Julian date is recommended for astronomical use by the International Astronomical Union.
The Julian Day Number (JDN) is the Julian day with the fractional part ignored. It is sometimes used in calendrical calculation, in which case, JDN 0 is used for the date equivalent to Monday January 1, 4713 BC in the Julian calendar.
The term Julian date is widely used to refer to the day-of-year (ordinal date) although incorrectly.