Trying simple insert but nothing is added to the trie object

[rvencu]

`$trie = new Trie;
$rtrie = new Trie;

	$wordCount = 0;
	foreach ( $wordData as $word ) {
		if ( $word > '' ) {
			$trie->insert( $word );
			$rtrie->insert( strrev( $word ) );
			++ $wordCount;
		}
	}`

I have a collection of 38000 items (composed of one or more words) that I am trying to add to trie but nothing happens with the above code

I also tried this variation
$trie[$word] = $word

but in this case, the page returns error 503 (server too busy)

both versions are NOT producing any PHP error inside the error log

[rvencu]

$hat = HatTrie::fromArray( $wordData ); also triggers a 503 error

[ace411]

Thank you for raising this issue. I'd like to understand your problem a little better: to that effect, the following questions - I feel - suffice:

• Which version of PHP are you running?

• Which platform are you running the extension on?

• Are you attempting to store string keys? I ask because there might be some irregularities I might not be able to deduce from your snippet.

[ace411]

Also, I've noticed that your use of the insert method features only one parameter when 2 are required. Please take a look at the snippet - I feel might be ameliorative - below:

// consider using for-loop if you have arrays with numeric indexes
for ($idx = 0; $idx < count($wordData); ++$idx) {
  $key = $wordData[$idx];

  // empty check is to guard against exception thrown upon detection of empty key
  if (!empty($key)) { 
    // again, insert method takes two parameters
    $trie->insert($key, $key);
  }
}

[rvencu]

Thanks. Using PHP 7.3.23 on Centos 7. I am attempting to store strings, some of them may contain one or more spaces, no other punctuation.

[rvencu]

Also, I am no trie algo expert but why the redundancy for the insert method to send duplicated values as arguments? Are there cases when the 2 parameters differ?

Please add a reference to the theory you used to build the extension.

[ace411]

The second argument of the insert method doesn't have to be a repeat key - it is, in fact, a placeholder for an arbitrary value. Please check out my article on Tries and the library documentation - texts I feel will likely prove elucidatory.

[rvencu]

Great, thanks for heads up.

[rvencu]

So, I compiled and activated the module, got proper confirmation in phpinfo(). But when I try to add any data inside the trie object I get 503 errors. Even the basic examples throw this error. The only thing that will not throw error is initialization like $trie = new Trie; line.

I cannot find reason in php error_logs. I do not know how to further debug things from here.

Apache error log just show a lot of these: AH01067: Failed to read FastCGI header which indicates fault in PHP script