preg_replace and multidimensional array

PHP
1

Just for reference, is there a way to make the following work…

$x=1;
    
while (mysqli_stmt_fetch($stmt1)){
    $badWordsArray[$x] = array('id' => $badID,
                    'word' => $badWord,
                    'pattern' => "~\b($badWord)(s?)\b~");
    $x=$x+1;
}


$string = 'some bad-ass words here';

$replacements = '****';

$new = preg_replace($badWordsArray[]['pattern'], $replacements, $string);

If I run that code PHP complains…

Fatal error: Cannot use [] for reading in /Users/user1/Documents...

And if I remove the first then PHP complains…

Notice: Undefined index: pattern in /Users/user1/Documents...
Warning: preg_replace(): Empty regular expression in /Users/user1/Documents...

I got things working with a one-dimensional array, but it would be nice to get the above code working so I can use one multidimensional array for several things in my function.

Thanks.

2

you can transform your badWords array (via array_map() ) so that preg_replace() gets a valid array of patterns.

note: while $badWordsArray[] allows you to define a new array element, for reading an array element you must use an existing key.

3

I think I understand what array_map does, but I don’t follow what you are suggesting in my particular case…

Again, I’m not following you…

4

you know what array you have built from your DB query, you know (and if you don’t, read it up in the manual) what array preg_replace() expects. hence, transform array 1 into array 2.

hm, what array element should $badWordsArray[] return to you?

5

Sorry, but I don’t see how the function or your response helps where I am stuck…

I have a multidimensional array which contains bad words, but it seems that preg_replace only wants $patterns in a one-dimensional array.

I fail to see how array_map would help here.

The first thing I need to know is whether I can coax preg_replace into accepting bad words from my multidimensional array, or if I have to ditch it and create a one-dimesnional array as a compromise.

As it stands, $badWordsArray returns an array of arrays about bad words (i.e. metadata)

6

example:

$ex = [
    ['foo' => 1, 'bar' => 2], 
    ['foo' => 2, 'bar' => 4], 
    ['foo' => 3, 'bar' => 6], 
];
var_dump(
    array_map(function($item) {
        return $item['foo'];
    }, $ex)
);

that wasn’t the question. it was about what $badWordsArray[] returns, not $badWordsArray

7

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