Split sentence into words and check MySQL for occurance - php

Question

I have a variable that is a sentence for example this is a sentence. I have a MySQL database which has rows where one column contains the following:
"random sentences"
"few random words"
"this is cool"
"a car"
"nice placement"
I need to print out occurrences of any word in the sentence existing in the database rows. For the example sentence given above, the result would be:
"random sentences"
"this is cool"
"a car"
This is what I have tried so far:
<?php
$servername = "localhost";
$username = "dsfdsfds";
$password = "sdfdfsdsf";
$dbname = "sdf";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$galleries = "This is a sentence";
$sql = "
SELECT *
FROM rawwords
WHERE origin LIKE '%" . $galleries. "%'
";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
while($row = $result->fetch_assoc()) {
echo "id: " . $row["id"]. " - location: " . $row["sentence"]. " <br><br>";
}
} else {
echo "0 results";
}
$conn->close();
?>

Answer 1

Create the right sql :D
$galleries ="This is a sentence";
$arr = explode(" ", $galleries);
$sql = "SELECT * FROM rawwords WHERE origin LIKE";
$lenght = count($arr);
for ($i=0; $i<$lenght; $i++) {
if ($i == 0) {
$sql .=" '% " . $arr[$i]. " %'";
} else {
$sql .=" or '% " . $arr[$i]. " %'";
}
}

Answer 2

You could use REGEXP to fin words in your sentences using [[:<:]]word[[:>:]] (word boundaries). You could split your string to get words, then use array_map() to transform them for the query. Finally, you could use implode() with " or " glue:
$galleries = "This is a sentence" ;
$words = preg_split('~\W~', $galleries, -1, PREG_SPLIT_NO_EMPTY);
$words = array_map(function($word) {
return ' origin REGEXP "[[:<:]]'.$word.'[[:>:]]" ';
}, $words);
$where = implode(' OR ', $words);
$sql = "SELECT * FROM rawwords WHERE $where";
Will generate the query:
SELECT * FROM rawwords
WHERE origin REGEXP "[[:<:]]This[[:>:]]"
OR origin REGEXP "[[:<:]]is[[:>:]]"
OR origin REGEXP "[[:<:]]a[[:>:]]"
OR origin REGEXP "[[:<:]]sentence[[:>:]]"
Important, you should have an attentive look to parameterized queries.
Please read this article with several examples: How can I prevent SQL injection in PHP?