Using a list with regex in php

Question

$word = file('list.txt');
$content = file_get_contents('fleetyfleet.txt');

fleetyfleet.txt contains

DimensionNameGreenrandomjunktextextcstuffidonwantDimensionNameBluemoreeecrapidontwannaseeeDimensionNameYellowDimensionNameGrayrandomcrapDimensionNameRed

list.txt contains

Green Blue Yellow

what i want is to be able to find DimensionName then store the word after it into an array if the word is in list.txt

so when script was ran the result stored in array would be Green,Blue,Yellow but not Red and Gray because they are not in our list

elixenide · Accepted Answer · 2014-02-26 21:56:16Z

2

Explode your word list, then loop over it:

$word = file_get_contents('list.txt');
$content = file_get_contents('fleetyfleet.txt');
$found_dimensions = array(); // our array
$word_array = explode(' ', $word); // explode the list
foreach($word_array as $one_word) { // loop over it
    $str = 'DimensionName'.$one_word; // what are we looking for?
    if(strstr($content, $str) !== false) { // look for it!
        echo "Found $one_word<br/>"; // Just for demonstration purposes
        $found_dimensions[] = $one_word; // add to the array
    }
}

edited Feb 26, 2014 at 21:56

answered Feb 26, 2014 at 21:07

elixenide

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9 Comments

user3272479 Over a year ago

I cant get it to work properly <?php $word = file('pixelmon-server-list.com/list.txt'); $content = file_get_contents('pixelmon-server-list.com/fleetyfleet.txt'); $found_dimensions = array(); // our array $word_array = explode(' ', $word); // explode the list foreach($word_array as $one_word) { // loop over it $str = 'DimensionName'.$one_word; // what are we looking for? if(strstr($content, $str) !== false) { // look for it! echo $one_word; // Just for demonstration purposes $found_dimensions[] = $one_word; // add to the array } } ?>

elixenide Over a year ago

Can you explain what isn't working? If pixelmon-server-list.com refers to a remote server, you need to add http:// in front of each time you use it.

user3272479 Over a year ago

the http is there on mine it just removed when i posted it but its not echoing the results because i know it should find some but none is echoing

elixenide Over a year ago

This works fine for me based on the info in the question. What's the separator between words in list.txt?

elixenide Over a year ago

I had a typo; file in the first line should have been file_get_contents.

|

Tomasz Kowalczyk · Accepted Answer · 2014-02-27 11:33:30Z

1

The trick is to explode() your file contents by delimiter and then filter results with the words from the list. $matching contains all found fragments matching list.

$words = file_get_contents('list.txt');
$text = file_get_contents('content.txt');

$elements = explode('DimensionName', $text); // trick
$words = explode(' ', $words); // words list

// leverage native PHP function
$matching = array_reduce($elements, function($result, $item) use($words) {
    if(in_array($item, $words)) { $result[] = $item; }
    return $result;
    }, array());

var_dump($matching);

UPDATE

array_reduce() is a neat function, but I totally forgot about a way simpler solution:

$matching = array_intersect($words, $elements);

From the docs:

array_intersect() returns an array containing all the values of array1 that are present in all the arguments. Note that keys are preserved.

So $matching will contain all elements from $words array that are present in $elements. This is the simplest and possibly the best solution here.

edited Feb 27, 2014 at 11:33

answered Feb 26, 2014 at 21:08

Tomasz Kowalczyk

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1 Comment

Tomasz Kowalczyk Over a year ago

I think that you'll like my updated answer better. :)

Sam · Accepted Answer · 2014-02-26 21:08:57Z

I think this is what you wanted..I loop through each word in list.txt, and then use a preg_match() to see if that dimension is in fleetyfleet.txt (you don't need a regex for my example, but I left it in case your example is more complicated). If it matches, then I add the match to your array of $dimensions.

<?php
$dimensions = array();

$content = 'DimensionNameGreenrandomjunktextextcstuffidonwantDimensionNameBluemoreeecrapidontwannaseeeDimensionNameYellowDimensionNameGrayrandomcrapDimensionNameRed';
$list = 'Green Blue Yellow';

foreach(explode(' ', $list) as $word) {
    if(preg_match('/DimensionName' . trim($word) . '/', $content, $matches) {
        $dimensions[] = reset($matches);
    }
}

var_dump($dimensions);
// array(3) {
//     [0]=> string(18) "DimensionNameGreen"
//     [1]=> string(17) "DimensionNameBlue"
//     [2]=> string(19) "DimensionNameYellow"
// }

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