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Document new environment variables and display options #7217

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Merged
merged 9 commits into from
Apr 15, 2017
Merged

Document new environment variables and display options #7217

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7b26e44
Document new environment variables and display options
sawmurai Dec 3, 2016
adbec6d
Reformat documentation and link to class doc.
sawmurai Dec 3, 2016
9340846
Replaced the list to use an unordered list
javiereguiluz Dec 3, 2016
dfb6d6a
Trimmed some lines to respect the 80-char soft limit
javiereguiluz Dec 3, 2016
ad90321
Describe flags in more detail
sawmurai Dec 3, 2016
6b2248e
Fix mention of file
sawmurai Dec 3, 2016
0c46fce
Respect 80 chars line length
sawmurai Dec 3, 2016
2ef1b60
Fix format
Dec 8, 2016
29080a6
Minor formatting changes
javiereguiluz Apr 15, 2017
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23 changes: 22 additions & 1 deletion components/var_dumper/advanced.rst
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Expand Up @@ -97,7 +97,12 @@ Dumpers

A dumper is responsible for outputting a string representation of a PHP variable,
using a :class:`Symfony\\Component\\VarDumper\\Cloner\\Data` object as input.
The destination and the formatting of this output vary with dumpers.
The destination and the formatting of this output vary with dumpers and are
influenced by two environment variables:

* If ``DUMP_STRING_LENGTH`` is set, then the length of a string is displayed
next to its content.
* If ``DUMP_LIGHT_ARRAY`` is set, then arrays are not displayed completely.
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I don't fully understand the purpose of this option. Looking for DUMP_LIGHT_ARRAY in the code didn't help me either. What does exactly this option do? Thanks!

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I described the flags in more detail now and moved the section to the end of the paragraph. :)


This component comes with an :class:`Symfony\\Component\\VarDumper\\Dumper\\HtmlDumper`
for HTML output and a :class:`Symfony\\Component\\VarDumper\\Dumper\\CliDumper`
Expand Down Expand Up @@ -181,6 +186,22 @@ method. They also typically implement the
them from re-implementing the logic required to walk through a
:class:`Symfony\\Component\\VarDumper\\Cloner\\Data` object's internal structure.

The :class:`Symfony\\Component\\VarDumper\\Dumper\\HtmlDumper` limits string
length and nesting depth of the output. These options can be overriden by
providing a third parameter when calling ``dump``::

use Symfony\Component\VarDumper\Dumper\HtmlDumper;

$output = fopen('php://memory', 'r+b');

$dumper = new HtmlDumper();
$dumper->dump($var, $output, array(
'maxDepth' => 1,
'maxStringLength' => 160
));

// Limit nesting to 1 level and string length to 160 characters (default)

Casters
-------

Expand Down