PHP Code to Open File and Replace Content

PHP Code Function to Open a File, Replace Content/Text in it, Returning the Altered File

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/* --------------------------------------------------------------
   function to open a file [$path] and replace content in it
   [$oldContent] with [$newContent] and return the altered content
  --------------------------------------------------------------- */
  function fileReplaceContent($path, $oldContent, $newContent)
  {
     // Check if the file exists and is readable
     if(!file_exists($path) || !is_readable($path))
     {
       return [false, "File [" . $path . "] does not exist or is not readable."];
     }
   
     $content = file_get_contents($path);  // Read the content of the file
   
     if($content === false)
     {
       return [false, "Error opening or reading file at [" . $path . "]"];
     }
   
     if (!is_writable($path)) // file can't be written to
     {
       return [false, "File [" . $path . "] is not writable."];
     }
   
      // Replace the text
     $modifiedContent = str_replace($oldContent, $newContent, $content);

return [true, $modifiedContent];
  }

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