How can PHP be used to identify and exclude specific words or phrases from a text?

To identify and exclude specific words or phrases from a text in PHP, you can use the `str_replace()` function to replace the unwanted words or phrases with an empty string. This function takes three parameters: the word or phrase to be replaced, the replacement text (in this case, an empty string), and the input text. 

$input_text = "This is a sample text with some unwanted words.";
$unwanted_words = array("unwanted", "words");

foreach ($unwanted_words as $word) {
    $input_text = str_replace($word, "", $input_text);
}

echo $input_text;

Keywords

PHP string manipulation regular expressions preg_replace filtering

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