Php regex returning repeats in nested arrays - php

Question

I'm trying to get a list of all occurrences of a file being included in a php script.
I'm reading in the entire file, which contains this:
<?php
echo 'Hello there';
include 'some_functions.php';
echo 'Trying to find some includes.';
include 'include_me.php';
echo 'Testtest.';
?>
Then, I run this code on that file:
if (preg_match_all ("/(include.*?;){1}/is", $this->file_contents, $matches))
{
print_r($matches);
}
When I run this match, I get the expected results... which are the two include sections, but I also get repeats of the exact same thing, or random chunks of the include statement. Here is an example of the output:
Array (
[0] => Array ( [0] => include 'some_functions.php'; [1] => include 'include_me.php'; )
[1] => Array ( [0] => include 'some_functions.php'; [1] => include 'include_me.php'; ) )
As you can see, it's nesting arrays with the same result multiple times. I need 1 item in the array for each include statement, no repeats, no nested arrays.
I'm having some trouble with these regular expressions, so some guidance would be nice. Thank you for your time.

Answer 1

what about this one
<?php
preg_match_all( "/include(_once)?\s*\(?\s*(\"|')(.*?)\.php(\"|')\s*\)?\s*;?/i", $this->file_contents, $matches );
// for file names
print_r( $matches[3] );
// for full lines
print_r( $matches[0] );
?>
if you want a better and clean way, then the only way is php's token_get_all
<?php
$tokens = token_get_all( $this->file_contents );
$files = array();
$index = 0;
$found = false;
foreach( $tokens as $token ) {
// in php 5.2+ Line numbers are returned in element 2
$token = ( is_string( $token ) ) ? array( -1, $token, 0 ) : $token;
switch( $token[0] ) {
case T_INCLUDE:
case T_INCLUDE_ONCE:
case T_REQUIRE:
case T_REQUIRE_ONCE:
$found = true;
if ( isset( $token[2] ) ) {
$index = $token[2];
}
$files[$index] = null;
break;
case T_COMMENT:
case T_DOC_COMMENT:
case T_WHITESPACE:
break;
default:
if ( $found && $token[1] === ";" ) {
$found = false;
if ( !isset( $token[2] ) ) {
$index++;
}
}
if ( $found ) {
if ( in_array( $token[1], array( "(", ")" ) ) ) {
continue;
}
if ( $found ) {
$files[$index] .= $token[1];
}
}
break;
}
}
// if your php version is above 5.2
// $files index will be line numbers
print_r( $files );
?>

Answer 2

Use get_included_files(), or the built-in tokenizer if the script is not included
I'm searching through a string of another files contents and not the
current file
Then your best bet is the tokenizer. Try this:
$scriptPath = '/full/path/to/your/script.php';
$tokens = token_get_all(file_get_contents($scriptPath));
$matches = array();
$incMode = null;
foreach($tokens as $token){
// ";" should end include stm.
if($incMode && ($token === ';')){
$matches[] = $incMode;
$incMode = array();
}
// keep track of the code if inside include statement
if($incMode){
$incMode[1] .= is_array($token) ? $token[1] : $token;
continue;
}
if(!is_array($token))
continue;
// start of include stm.
if(in_array($token[0], array(T_INCLUDE, T_INCLUDE_ONCE, T_REQUIRE, T_REQUIRE_ONCE)))
$incMode = array(token_name($token[0]), '');
}
print_r($matches); // array(token name, code)

Answer 3

Please read, how works preg_match_all
First item in array - it return all text, which is in regular expression.
Next items in array - that's texts from regular expression (in parenthesises).
You should use $matches[1]