PHP : Insert with Condition - php

Question

I have a query like this:
$content = "How technology is helping to change the way people think about the food on their plate and the food impact for them. Technology could have a role to play in raising awareness of the impact our diets have on the planet.";
$exp = explode(" ", $content)
for($j = 0; $j < count($exp); $j++){
$this->db->query("INSERT INTO news (news_id, news_content) VALUES ('$id', $exp[$j])");
}
But, I don't want to insert all the words, i just need to insert the word that only appear more than once (technology, food, impact). Is it possible to do that? can someone help me?

Answer 1

I would process the text content using array_filter to exclude words that are in a stopword list, then count the occurrences of each word using array_count_values and then array_filter out the words that occur only once. You can then write the remaining words (which will be the keys of the output array) to the database. For example:
$content = "How technology is helping to change the way people think about the food on their plate and the food impact for them. Technology could have a role to play in raising awareness of the impact our diets have on the planet.";
$stopwords = array('how', 'is', 'to', 'the', 'way', 'on', 'and', 'for', 'a', 'in', 'of', 'our', 'have');
// count all words in $content not in the stopwords list
$counts = array_count_values(array_filter(explode(' ', strtolower($content)), function ($w) use ($stopwords) {
return !in_array($w, $stopwords);
}));
// filter out words only seen once
$counts = array_filter($counts, function ($v) { return $v > 1; });
// write those words to the database
foreach ($counts as $key => $value) {
$this->db->query("INSERT INTO news (news_id, news_content) VALUES ('$id', '$key')");
}
For your sample data, the final result in $counts will be:
Array
(
[technology] => 2
[food] => 2
[impact] => 2
)

Answer 2

There are a lot of options here I believe.
Here is my solution(s): You could use search_array() for this. The search array returns false if no other needle is found in_array in an array. If another word is found it returns the key.
Depending of your needs, you could use one of these options below.
//Option 1
//Words that actually appear more than once...
$new_arr = array();
foreach($exp as $key=>$e) {
//Must be this word only (therefore the true-statement
$search = array_search($e, $exp, true);
if ($search !== false && $search != $key) {
$new_arr[] = $e;
}
}
//Option 2
//
//Your question was not totally clear so I add this code as well
//Words with asterixes before and after that appear more than once
$new_arr = array();
foreach($exp as $key=>$e) {
//Two asterixes at the beginning of the sting and two at the end
//strtolower sets **Technology** and **technology** as a duplicate of word
if (substr($e,0,2) == "**" && substr($e,-2,2) == "**") {
$search = array_search(strtolower($e), $exp);
if ($search !== false && $search != $key) {
$new_arr[] = $e;
}
}
}
for($j = 0; $j < count($new_arr); $j++){
$this->db->query("INSERT INTO news (news_id, news_content)
VALUES ('$id', $new_arr[$j])");
}
As someone mentioned in a comment you should prevent SQL injections by typing that way in the INSERT-statement (and you should), but the question was mainly about finding duplicates in a string in do something with them so therefore I won't go further with that comment.
The result array $new_arr would like: (option 1)
array (size=9)
0 => string 'the' (length=3)
1 => string 'the' (length=3)
2 => string '**food**' (length=8)
3 => string 'to' (length=2)
4 => string 'the' (length=3)
5 => string '**impact**' (length=10)
6 => string 'have' (length=4)
7 => string 'on' (length=2)
8 => string 'the' (length=3)
The reason why Technology and technology is not the same because that its an uppercase T in one of the words.
The result array $new_arr would like: (option 2)
array (size=3)
0 => string '**food**' (length=8)
1 => string '**Technology**' (length=14)
2 => string '**impact**' (length=10)