PHP dynamically add new column and value in existing Query - php

Question

My application performs INSERT queries like this:
INSERT INTO table (`col1`, `col2`, `col3`) VALUES ('oneVal', 'twoVal', 'threeVal')
Now I want to rebuild my application so it will ALWAYS SELECT, INSERT, DELETE and UPDATE with a specific id.
Let's say the unique id is called: companyId
I don't want to rewrite all my queries manually, so I am trying to write a function that rewrites the existing SQL queries with PHP so it will include the companyId inside the query.
Desired outcome if companyId would be '1' (companyId IS NOT ALWAYS '1'!):
INSERT INTO table (`col1`, `col2`, `col3`, `companyId`) VALUES ('oneVal', 'twoVal', 'threeVal', '1')
My question(s) is/are:
Is there a way in PHP so I can dynamically rewrite the query so
it would include the companyId column and the matching id value?
Is there a better way to do this? Like some trick setting MySQL
server to ALWAYS use an extra value (in this case companyId='1'
?
I've tried option (1) by searching for the string
) VALUES
Once I found that string, I add companyId before the ).
Now get to the end of the query, get the most right ) and add the value before that.
But is this for a generic case? I think there might be a better way to solve this.
Thanks in advance community!
EDIT 1 with more clarification
Currently I've already built a function that modifies my SELECT statements.
Function code:
//If current query = SELECT query
if (containsString($sql, 'select')) {
//Check if contains WHERE
if (containsString($sql, 'where')) {
//Yes
//Add companyId after WHERE
$sql = substr_replace($sql, '(companyId=?) AND ', strpos($sql, 'WHERE') + 6, 0);
//Explanation:
//SELECT * FROM table WHERE deleted='No'; becomes -->
//SELECT * FROM table WHERE (companyId=?) AND deleted='No';
}else{
//No
//Get table , and after that INSERT WHERE companyId=?
$tableName = explode(' from ', strtolower($sql))[1]; //Get part AFTER 'from'
//First word after $tableName = tablename
$tableName = explode(' ', $tableName)[0]; //First word after 'from' = tablename
$sql = substr_replace($sql, 'WHERE (companyId=?) ', strpos($sql, $tableName) + strlen($tableName) + 1, 0);
//Explanation:
//SELECT * FROM table ORDER BY id; becomes -->
//SELECT * FROM table WHERE (companyId=?) ORDER BY id;
}
}
So this code dynamically adds an extra condition to the query statement.
This is also easily possible with DELETE and UPDATE statements (same as SELECT)
But Iam trying to come up with something like this for INSERT INTO queries.
How can I modify the original query using the new companyId?

Answer 1

I guess If you have an associative array with the column names and values then you easily can make it more dynamic for future also. Let's say you've an array of column names with value of it e.g
$data = ['col1'=>'val1','col2'=>'val2','col3'=>'val3','companyId'=>1];
$query = "INSERT INTO `yourtable` ( ".implode(' , ', array_keys($data)).") VALUES ('".implode("' , '", array_values($data))."')";
echo $query;
DEMO: https://3v4l.org/udt1i
Then you can do with regex replace way globally to add column and value to all of your 100 query.
<?php
$re = '/\) VALUES (.+?(?=\)))/m';
$str = 'INSERT INTO table (`col1`, `col2`, `col3`) VALUES (\'oneVal\', \'twoVal\', \'threeVal\')';
$subst = ',`col4`) VALUES $1 , \'1\'';
$result = preg_replace($re, $subst, $str);
echo $result;
?>
DEMO: https://3v4l.org/rOQDG