How can PHP be used to load and modify only specific variables from a document?

When working with a document containing multiple variables, you may want to load and modify only specific variables without affecting others. One way to achieve this is by using PHP's file handling functions to read the document, extract the desired variables, make modifications, and then save the changes back to the document. 

// Load the contents of the document into a string
$file_contents = file_get_contents('document.txt');

// Extract and modify specific variables
$variable1 = 'new value';
$variable2 = 'updated value';
$file_contents = preg_replace('/\$variable1 = \'(.*)\';/', "\$variable1 = '$variable1';", $file_contents);
$file_contents = preg_replace('/\$variable2 = \'(.*)\';/', "\$variable2 = '$variable2';", $file_contents);

// Save the modified contents back to the document
file_put_contents('document.txt', $file_contents);

Keywords

PHP file_get_contents preg_match regular expressions variable manipulation

Related Questions