|
Server : Microsoft-IIS/10.0 System : Windows NT HMW9050 6.2 build 9200 (Unknow Windows version Standard Edition) i586 User : fatorc ( 0) PHP Version : 5.3.28 Disable Function : escapeshellarg, escapeshellcmd, exec, passthru, proc_close, proc_open, shell_exec, system, dl, popen, php_check_syntax, php_strip_whitespace, symlink, link, openlog, apache_child_terminate Directory : e:/home/fatorc/Web/wp-content/plugins/types/library/twig/twig/doc/tests/ |
Upload File : |
``defined``
===========
``defined`` checks if a variable is defined in the current context. This is very
useful if you use the ``strict_variables`` option:
.. code-block:: jinja
{# defined works with variable names #}
{% if foo is defined %}
...
{% endif %}
{# and attributes on variables names #}
{% if foo.bar is defined %}
...
{% endif %}
{% if foo['bar'] is defined %}
...
{% endif %}
When using the ``defined`` test on an expression that uses variables in some
method calls, be sure that they are all defined first:
.. code-block:: jinja
{% if var is defined and foo.method(var) is defined %}
...
{% endif %}