Anonymous functions does not work: Function name must be a string

Question

I have:

PHP Version 5.4.20
'./configure' '--disable-fileinfo' '--enable-bcmath' '--enable-calendar' '--enable-ftp' '--enable-gd-native-ttf' '--enable-libxml' '--enable-mbstring' '--enable-pdo=shared' '--enable-soap' '--enable-sockets' '--enable-zip' '--prefix=/usr/local' '--with-apxs2=/usr/local/apache/bin/apxs' '--with-curl=/opt/curlssl/' '--with-freetype-dir=/usr' '--with-gd' '--with-imap=/opt/php_with_imap_client/' '--with-imap-ssl=/usr' '--with-jpeg-dir=/usr' '--with-kerberos' '--with-libdir=lib64' '--with-libxml-dir=/opt/xml2' '--with-libxml-dir=/opt/xml2/' '--with-mcrypt=/opt/libmcrypt/' '--with-mysql=/usr' '--with-mysql-sock=/var/lib/mysql/mysql.sock' '--with-openssl=/usr' '--with-openssl-dir=/usr' '--with-pcre-regex=/opt/pcre' '--with-pdo-mysql=shared' '--with-pdo-sqlite=shared' '--with-pic' '--with-png-dir=/usr' '--with-xpm-dir=/usr' '--with-zlib' '--with-zlib-dir=/usr'

And I test this code:

$greet = function($name) {
    printf("Hello %s\r\n", $name);
};

$greet('PHP');

I am getting this error:

Fatal error: Function name must be a string

On PHP Version 5.3.10-1ubuntu3.8 it is working as it should. Does anyone what is going on?

This may have no bearing on the questions, but which version of PHP is it really? In the first part of your post, you say 5.4.20. In the last sentence, you say 5.3.10. — Kyle
– Kyle, Commented Dec 9, 2013 at 19:13
Do you install php from the source code or using the package manager as YUM or apt-get — Snowwolf
– Snowwolf, Commented Dec 9, 2013 at 19:22

FlyLord · Accepted Answer · 2013-12-09 21:42:13Z

5

Uhh, I think I just find out :( : http://snippets.webaware.com.au/howto/eaccelerator-and-php-closures-dont-mix

answered Dec 9, 2013 at 21:42

FlyLord

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Hamid Reza Salimian · Accepted Answer · 2014-12-04 23:11:48Z

1

its because of eAccelerator and you should disable it

To turn off eAccelerator, make the following changes in your php.ini configuration:

eaccelerator.enable 0
eaccelerator.optimizer 0

or in .htaccess files

php_flag eaccelerator.enable 0
php_flag eaccelerator.optimizer 0

answered Dec 4, 2014 at 23:11

Hamid Reza Salimian

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FlyLord · Accepted Answer · 2013-12-09 21:37:05Z

0

Btw, I noticed problem with this server (it is client's VPN server) when I uploaded symfony application and I got this error

ContextErrorException: Warning: preg_replace_callback(): Requires argument 2, '', to be a valid callback in /home/client/vendor/symfony/symfony/src/Symfony/Component/Yaml/Unescaper.php line 56

answered Dec 9, 2013 at 21:37

FlyLord

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