asked on

PHP implode array and list results with some logic

Hello,

I am working with an array and would like to retrieve a list of results from the strings. This is just test data, I am doing this to learn more about arrays and would like to return results based on the logic below (//logic in comments).

Thank you

Data:
"The Cat ran with the hat."
"The bat had a cat."
"The rat sat on the Bat!"

Results after logic:
"bat"
"cat"
"hat"
"ran"
"rat"
"sat"

<?php

$myArr = Array("The Cat ran with the hat.",
"the bat had a cat.",
"The rat sat on the Bat!");

//implode $myArr

//for each $myArr

//remove any unwanted strings
//not sure what is better preg_replace or str_replace. If no regEx, I've read that string replace is better?
//unwanted strings - regardless of upper/lower case
$not_these_str("The",
" with ",
" had ",
" a ",
" on ",
"!",
"."
)

//$results = remove any duplicates from results

//$results = arrange alphanumeric

echo $results;

?>

//trying for these as results:

"bat"
"cat"
"hat"
"ran"
"rat"
"sat"

Ray Paseur

Please see: http://iconoun.com/demo/temp_johnsonallstars.php

<?php // demo/temp_johnsonallstars.php

/**
 * http://www.experts-exchange.com/Programming/Languages/Scripting/PHP/Q_28676605.html
 */
error_reporting(E_ALL);
echo '<pre>';

// AGGREGATE THE RESULTS IN THIS ARRAY
$m = [];

// THE TEST DATA
$data = <<<EOD
"The Cat ran with the hat."
"The bat had a cat."
"The rat sat on the Bat!"
EOD;

// THE ARRAY OF STOPWORDS
$not_these =
[ "the"
, "with"
, "had"
, "a"
, "on"
]
;
// NORMALIZE THE DATA
$data = strtolower($data);
$data = preg_replace('/[^a-z ]/', ' ', $data);
$data = preg_replace('/\s+/', ' ', $data);
$data = trim($data);
$data = explode(' ', $data);

// ACTIVATE THIS TO CHECK THE NORMALIZATION
// var_dump($data);

// REMOVE STOPWORDS
foreach ($data as $key => $str)
{
    if (in_array($str, $not_these)) unset($data[$key]);
}

// KEEP ONLY THE SORTED LIST OF WORDS
$data = array_unique($data);
sort($data);
print_r($data);

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johnsonallstars

ASKER

Hi Ray..

Your result worked great for me. How would it differ in an array vs. the <<<EOD. syntax that you have?

As the EOD syntax it is working, but when I set to an array.. I get this error

strtolower() expects parameter 1 to be string, array given ….on line 28

$data = array(
"The Cat ran with the hat.",
"The bat had a cat.",
"The rat sat on the Bat!"
);

ASKER CERTIFIED SOLUTION

Ray Paseur

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johnsonallstars

ASKER

Very nice. Ok.. Yes, worked both ways!

Thanks again!!

Ray Paseur

Thanks for the points and thanks for using E-E! Best regards, ~Ray