How To Count Banned Words On Page?

[uniqueideaman]

@John_Betong

@uniqueideaman

Now, can anyone figure why the following attempt gives a blank white page.

'good to see error reporting is used correctly.

When blank pages occur I usually add this at the bottom of the script to confirm the script executed up to that line.
echo '<br>line: ' .__line__;

Two results:

1. Success: - the line corresponds to the actual line of script:

• select a possible incorrect $val and use var_dump( $val );die; to confirm $val returns the expected value.
  Rectify problem or try another $val.

2. Failed: - the line is not rendered
   move the line halfway up the script and try again.
   On result, either move the line up or down and reiterate until the problem is pinpointed.

I just added that line as you suggested but my script is not executing all the lines.
Why is that ?
There are 8 snippets but only 2 are getting executed! Strange!
Ok, it does not matter whether all the 8 are perfect or not. It should either show all their results or errors if any snippet is out of touch. Right ?

<?php

/*
ERROR HANDLING
*/
declare(strict_types=1);
ini_set('display_errors', '1');
ini_set('display_startup_errors', '1');
error_reporting(E_ALL);

/*
Formula:
returns true if $needle is a substring of $haystack
function contains($needle, $haystack)
{
    return strpos($haystack, $needle) !== false;
}
*/

//script 1: https://stackoverflow.com/questions/13795789/check-if-string-contains-word-in-array
//http://php.net/manual/en/function.in-array.php
//Simplest check.

$content = 'evil';
$targets = array("evil", "devil");

if (in_array($content, $targets)) {
    echo "Script 1 - Found Banned Word: HOW TO DISPLAY MATCHING WORD HERE ?";
}
?>
<br>


<?php
//script 2: https://stackoverflow.com/questions/32522192/check-if-an-array-element-is-in-a-string

$banned = array("evil", "devil");
//$email = $_POST['email'];
$email = "evil@devil.com";

    foreach ($banned as $ban) {
        if (stripos($email, $ban) !== FALSE) {
            echo "Script 2 - Found Banned Word: $ban";
            return true;
        }
    }
    echo "No banned words found.";
    return false;
?>
<br>


<?php
//script 3: https://stackoverflow.com/questions/32522192/check-if-an-array-element-is-in-a-string

$banned = array("evil", "devil");
//$email = $_POST['email'];
$email = "evil@devil.com";

foreach ($banned as $ban) {
    if (stripos($email,$ban) > -1){
        echo "Script 3 - Found Banned Word: $ban";
    }else{
        echo 'Email signed up!';
    }
}

?>
<br>


<?php
//script 4: https://stackoverflow.com/questions/13795789/check-if-string-contains-word-in-array

$content = "There are evil devils all over the place!";
$banned_words = array('evil', 'devil');

foreach($banned_words as $band_word) {
    $place = strpos($content, $band_word);
    if (!empty($place)) {
        echo "Script 4 - Found Banned Word: $band_word";
        exit;
    } else {
        echo "No banned words found!";
    }
}
?>


<?php
//script 5: https://stackoverflow.com/questions/32522192/check-if-an-array-element-is-in-a-string

$banned = array("evil", "devil");
//$email = $_POST['email'];
$email = "evil@devil.com";
$banned = false;

for($i=0; $i < count($banned); $i++) {
    if(strrpos($email, $banned[$i]) != FALSE ) {
       $banned = true;
       break;
    }
}
echo "Script 5 - Found Banned Word: $banned[$i]";

?>
<br>


<?php
//script 6: https://stackoverflow.com/questions/32522192/check-if-an-array-element-is-in-a-string

//$email = $_POST['email'];
$email = "evil@devil.com";

if(preg_match("/\b(evil|devil)\b/", $email)){
    echo "Script 6 - Found Banned Word: HOW DO I DISPLAY THE FOUND BANNED WORD HERE ? WOULD LIKE TO SEE SNIPPET EXAMPLE";
}

?>


<?php
//script 7: https://stackoverflow.com/questions/13795789/check-if-string-contains-word-in-array

//Checking arrays against other arrays
$keywords = array('evil','devil','satan');
$targets = array('monster','satan','devil');
foreach ( $targets as $string ) 
{
  foreach ( $keywords as $keyword ) 
  {
    if ( strpos( $string, $keyword ) !== FALSE )
     { echo "Script 7 - Found Banned Word: $string"; }
  }
}
?>
<br>


<?php

/*
Formula:
returns true if $needle is a substring of $haystack
function contains($needle, $haystack)
{
    return strpos($haystack, $needle) !== false;
}
*/
$banned_words_count = 0;
$article = "TEST ARTICLE
This is an article to see if our php script can spot any banned words in it or not.
These are the banned words: Evil, Devil.
Since this article contains these 2 banned words then our php script should be able to spot them and count them to 2.
End of article.";
$banned_words_1 = 'Evil';
$banned_words_2 = 'Devil';
if (strpos($article, "banned_words_1") == true) {
    echo 'Banned word found: "$banned_words_1"';
}
if (strpos($article, "banned_words_2") == true) {
    echo 'Banned word found: "$banned_words_2"';
}
if (preg_match("/banned_words_1/",$article))
    echo 'Banned word found: "$banned_words_1"';
if (preg_match("/banned_words_2/",$article))
    echo 'Banned word found: "$banned_words_2"';

echo '<br>line: ' .__line__;
    
?>

Notice your LINE at the final line, John_Betong!
Let us see if we can spot why the other snippets are not executing without the var_dump.
This is what I see:

Script 1 - Found Banned Word: HOW TO DISPLAY MATCHING WORD HERE ?
Script 2 - Found Banned Word: evil