PHP flow charts

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Visustin generates flow charts from code written in the PHP language (Personal Home Page or PHP: Hypertext Processor). The support covers PHP4, PHP5 and PHP7. Syntax support is current up to PHP 5.6 and 7.0. Older versions are supported.

Supported statements

The following statements are supported.

if..elseif..else
switch..case..default
while, do..while
for
foreach
break
continue
goto
return
yield
try..catch..finally, throw
die
declare
function, class, namespace etc. declarations
line labels
comments
<<<HEREDOC and <<<NOWDOC

Other statements are supported but have no specific visualization. Interface definitions are hidden.

PHP tags

PHP is a server-side scripting language that embeds source code in an HTML page. Visustin looks for opening and closing tags to extract source code from HTML. All text outside these tags is treated as HTML content. If there are no opening or closing tags, the code is assumed to be pure source code instead of HTML.

Visustin supports the following tags in PHP pages: <?..?> <?php ..?> <%..%> <script language="php">. Code within these tags is parsed as PHP code.

Limitations

The following syntax is unsupported or only limited support is provided. The chart may display a normal statement, not a branch or a jump.

Visustin works at the statement level. The internal structure of complex expressions is not visualized. The conditional expression :? is not split, nor is any short-circuited logic such as && or ||.
Code inside string literals (for the eval() function, for example) is not analyzed.
"Catchall" exception handling blocks (catch blocks) may display an extra "Not caught" edge even though the handler catches all possible exceptions. This happens because Visustin can't know what type of exceptions can occur with the given piece of code at run-time.
function declarations nested in code are not displayed at the original location.
Example: if (foo) { function bar() {} } is displayed as two separate control flows.
cfunction and old_function declarations are not supported.
anonymous functions (closures) are not flowcharted.
anonymous classes (new class syntax) are not flowcharted as classes.