Reputation: 6188

Solution for "Fatal error: Maximum function nesting level of '100' reached, aborting!" in PHP

I have made a function that finds all the URLs within an html file and repeats the same process for each html content linked to the discovered URLs. The function is recursive and can go on endlessly. However, I have put a limit on the recursion by setting a global variable which causes the recursion to stop after 100 recursions.

However, php returns this error:

Fatal error: Maximum function nesting level of '100' reached, aborting! in D:\wamp\www\crawler1\simplehtmldom_1_5\simple_html_dom.php on line 1355

ERROR

I found a solution here: Increasing nesting function calls limit but this is not working in my case.

I am quoting one of the answers from the link mentioned above. Please do consider it.

"Do you have Zend, IonCube, or xDebug installed? If so, that is probably where you are getting this error from.

I ran into this a few years ago, and it ended up being Zend putting that limit there, not PHP. Of course removing it will let >you go past the 100 iterations, but you will eventually hit the memory limits."

Is there a way to increase the maximum function nesting level in PHP

Upvotes: 147

Answers (23)

Yassine ECHCHARAFI

Reputation: 660

I had the same problem and I resolved it like this:

Open MySQL my.ini file
In [mysqld] section, add the following line: innodb_force_recovery = 1
Save the file and try starting MySQL
Remove that line which you just added and Save

Upvotes: -3

Kay Angevare

Reputation: 667

Stumbled upon this bug as well during development.

However, in my case it was caused by an underlying loop of functions calling eachother - as a result of continuous iterations during development.

For future reference by search engines - the exact error my logs provided me with was:

Exception: Maximum function nesting level of '256' reached, aborting!

If, like in my case, the given answers do not solve your problem, make sure you're not accidentally doing something along the lines of the following simplified situation:

function foo(){
    // Do something
    bar();
}

function bar(){
    // Do something else
    foo();
}

In this case, even if you set ini_set('xdebug.max_nesting_level', 9999); it will still print out the same error message in your logs.

Upvotes: 4

Maxence

Reputation: 13306

Increase the value of xdebug.max_nesting_level in your php.ini

Upvotes: 160

cofirazak

Reputation: 661

<?php
ini_set('xdebug.max_nesting_level', 9999);
... your code ...

P.S. Change 9999 to any number you want.

Upvotes: 5

Binod Kalathil

Reputation: 1969

Another solution if you are running php script in CLI(cmd)

The php.ini file that needs edit is different in this case. In my WAMP installation the php.ini file that is loaded in command line is:

\wamp\bin\php\php5.5.12\php.ini

instead of \wamp\bin\apache\apache2.4.9\bin\php.ini which loads when php is run from browser

Upvotes: 1

sobeit

Reputation: 75

I had this issue with WordPress on cloud9. It turns out it was the W3 Caching plugin. I disabled the plugin and it worked fine.

Upvotes: 1

Daniel Wondyifraw

Reputation: 7723

In your case it's definitely the crawler instance is having more Xdebug limit to trace error and debug info.

But, in other cases also errors like on PHP or core files like CodeIgniter libraries will create such a case and if you even increase the x-debug level setting it would not vanish.

So, look into your code carefully :) .

Here was the issue in my case.

I had a service class which is library in CodeIgniter. Having a function inside like this.

 class PaymentService {

    private $CI;

    public function __construct() {

        $this->CI =& get_instance();

   }

  public function process(){
   //lots of Ci referencing here...
   }

My controller as follow:

$this->load->library('PaymentService');
$this->process_(); // see I got this wrong instead  it shoud be like

Function call on last line was wrong because of the typo, instead it should have been like below:

$this->Payment_service->process(); //the library class name

Then I was keeping getting the exceed error message. But I disabled XDebug but non helped. Any way please check you class name or your code for proper function calling.

Upvotes: 2

Putri Dewi Purnamasari

Reputation: 257

If you're using Laravel, do

composer update

This should be work.

Upvotes: 3

Gujarat Santana

Reputation: 10564

on Ubuntu using PHP 5.59 :
got to `:

/etc/php5/cli/conf.d

and find your xdebug.ini in that dir, in my case is 20-xdebug.ini

and add this line `

xdebug.max_nesting_level = 200

or this

xdebug.max_nesting_level = -1

set it to -1 and you dont have to worry change the value of the nesting level.

Upvotes: 13

CalvinMD

Reputation: 11

I had a error when i was installing many plugins So the error 100 showed including the location of the last plugin that i installed C:\wamp\www\mysite\wp-content\plugins\"..." so i deleted this plugin folder on the C: drive then everything was back to normal.I think i have to limit the amount of plug-in i install or have activated .good luck i hope it helps

Upvotes: 1

Yasssine ELALAOUI

Reputation: 543

Go into your php.ini configuration file and change the following line:

xdebug.max_nesting_level=100

to something like:

xdebug.max_nesting_level=200

Upvotes: 13

svassr

Reputation: 5668

It's also possible to fix this directly in php, for example in the config file of your project.

ini_set('xdebug.max_nesting_level', 200);

Upvotes: 20

Martyn Shutt

Reputation: 1706

php.ini:

xdebug.max_nesting_level = -1

I'm not entirely sure if the value will ever overflow and reach -1, but it'll either never reach -1, or it'll set the max_nesting_level pretty high.

Upvotes: 8

Rafay

Reputation: 6188

A simple solution solved my problem. I just commented this line:

zend_extension = "d:/wamp/bin/php/php5.3.8/zend_ext/php_xdebug-2.1.2-5.3-vc9.dll

in my php.ini file. This extension was limiting the stack to 100 so I disabled it. The recursive function is now working as anticipated.

Upvotes: 62

Andrey

Reputation: 317

Check recursion from command line:

php -r 'function foo() { static $x = 1; echo "foo ", $x++, "\n"; foo(); } foo();'

if result > 100 THEN check memory limit;

Upvotes: 6

theredled

Reputation: 1040

You can also modify the {debug} function in modifier.debug_print_var.php, in order to limit its recursion into objects.

Around line 45, before :

$results .= '<br>' . str_repeat('&nbsp;', $depth * 2)
  . '<b> -&gt;' . strtr($curr_key, $_replace) . '</b> = '
  . smarty_modifier_debug_print_var($curr_val, ++$depth, $length);

After :

$max_depth = 10;
$results .= '<br>' . str_repeat('&nbsp;', $depth * 2)
  . '<b> -&gt;' . strtr($curr_key, $_replace) . '</b> = '
  . ($depth > $max_depth ? 'Max recursion depth:'.(++$depth) : smarty_modifier_debug_print_var($curr_val, ++$depth, $length));

This way, Xdebug will still behave normally: limit recursion depth in var_dump and so on. As this is a smarty problem, not a Xdebug one!

Upvotes: 0

shahinam

Reputation: 680

Rather than disabling the xdebug, you can set the higher limit like

xdebug.max_nesting_level=500

Upvotes: 23

Lee Woodman

Reputation: 1329

Try looking in /etc/php5/conf.d/ to see if there is a file called xdebug.ini

max_nesting_level is 100 by default

If it is not set in that file add:

xdebug.max_nesting_level=300

to the end of the list so it looks like this

xdebug.remote_enable=on
xdebug.remote_handler=dbgp
xdebug.remote_host=localhost
xdebug.remote_port=9000
xdebug.profiler_enable=0
xdebug.profiler_enable_trigger=1
xdebug.profiler_output_dir=/home/drupalpro/websites/logs/profiler
xdebug.max_nesting_level=300

you can then use @Andrey's test before and after making this change to see if worked.

php -r 'function foo() { static $x = 1; echo "foo ", $x++, "\n"; foo(); } foo();'

Upvotes: 12

vandersondf

Reputation: 899

probably happened because of xdebug.

Try commenting the following line in your "php.ini" and restart your server to reload PHP.

";xdebug.max_nesting_level"

Upvotes: 12

bacar ndiaye

Reputation: 595

Another solution is to add xdebug.max_nesting_level = 200 in your php.ini

Upvotes: 45

Louis-Philippe Huberdeau

Reputation: 5431

Rather than going for a recursive function calls, work with a queue model to flatten the structure.

$queue = array('http://example.com/first/url');
while (count($queue)) {
    $url = array_shift($queue);

    $queue = array_merge($queue, find_urls($url));
}

function find_urls($url)
{
    $urls = array();

    // Some logic filling the variable

    return $urls;
}

There are different ways to handle it. You can keep track of more information if you need some insight about the origin or paths traversed. There are also distributed queues that can work off a similar model.

Upvotes: 43

Yogu

Reputation: 9445

You could convert your recursive code into an iterative code, which simulates the recursion. This means that you have to push the current status (url, document, position in document etc.) into an array, when you reach a link, and pop it out of the array, when this link has finished.

Upvotes: 6

tamasgal

Reputation: 26299

You could try to wiggle down the nesting by implementing parallel workers (like in cluster computing) instead of increasing the number of nesting function calls.

For example: you define a limited number of slots (eg. 100) and monitor the number of "workers" assigned to each/some of them. If any slots become free, you put the waiting workers "in them".

Upvotes: 5

Solution for &quot;Fatal error: Maximum function nesting level of &#39;100&#39; reached, aborting!&quot; in PHP

Answers (23)

Another solution if you are running php script in CLI(cmd)

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Solution for "Fatal error: Maximum function nesting level of '100' reached, aborting!" in PHP