How to change value of a variable from a file? - php

Question

I need to replace a line in a file.php.
I need to replace a value of a variable of a file.php, yet I can get the desired line, take the value of the variable but do not know how to replace the whole line.
Example:
<?php
$archive = file('Library/config/PaymentConfig.php'); // transforms the content into an array where each line is a position
$valueLine = $archive[10]; // $environment = 'production';
function getEnvironment($valueLine){
$removecharacters = array('$environment = ', "'", ';');
return str_replace($removecharacters, '', urldecode($valueLine)); // returns only the value of the variable
}
if (getEnvironment($valueLine) == $myValue) { // $myValue = production or sandbox
// Here I need to replace the line
// For $environment = 'production'; or $environment = 'sandbox';
}
?>

Answer 1

As per my comment, i would suggest editing file.php to get the value from a txtfile/database.
Using a text file:
//file.php
$environment = file_get_contents('environment.txt');
Then in your code, you can change the value in the text file:
$environment = 'production';
file_put_contents('environment.txt', $environment);

Answer 2

Correct answer
if (getEnvironment($valueLine) == $myValue) { // $myValue = production or sandbox
$archive[10] = '$environment = "sandbox";' . "\n";
file_put_contents('Library/config/PaymentConfig.php', implode("", $archive));
}

Answer 3

Correct answer 2
<?php
$archive = "Library/config/PaymentConfig.php";
$search = "PaymentConfig['environment']";
$arrayArchive = file($archive);
$position = 0;
for($i = 0; $i < sizeof($arrayArchive); $i++){
if(strpos($arrayArchive[$i],$search) && (strpos($arrayArchive[$i],'production') || strpos($arrayArchive[$i],'sandbox'))){
$fullLine = $arrayArchive[$i]; // $PaymentConfig['environment'] = "production"; // production, sandbox
$position = $i;
if(strpos($fullLine, '"production"') == true){
$environment = '"production"';
} else if(strpos($fullLine, '"sandbox"') == true){
$environment = '"sandbox"';
}
}
}
echo $environment; // current environment
$newEnvironment = '"sandbox"'; // or $newEnvironment = '"production"';
if ($environment == $myValue) { // $myValue = production or sandbox
$arrayArchive[$position] = str_replace($environment, $newEnvironment, $fullLine);
file_put_contents($archive, implode("", $arrayArchive));
}
?>