Subtitle file is very useful to enjoy movie or any video or any clip from different languages. You can download srt files from various websites. But, If you want to save an SRT file in the database, you need to parse it. Here I am describing how to parse an SRT file and insert it in the wordpress database.

Let’s follow the instructions one by one.

Step 01: Make a PHP file named srt_parse.php

<?php
//make shortcode for upload form

function get_srt_form($atts, $content = null)
{
    $form = '<form action="#" method="post" enctype="multipart/form-data">
                <label for="srt_file">Upload srt file</label>
                <input type="file" name="srt_file" id="srt_file" />
                <input type="submit" name="srt_file_upload" >
            </form>';
    return $form;
}
add_shortcode( 'srt-form', 'get_srt_form' );

//make functions for parsing srt file
if(isset($_POST['srt_file_upload'])){
    //call the parse function
    parseSrt($_FILES['srt_file']['tmp_name']);
}
/*
*functions for parsing srt file
*/
function parseSrt($file)
{
    define('SRT_STATE_SUBNUMBER', 0);
    define('SRT_STATE_TIME',      1);
    define('SRT_STATE_TEXT',      2);
    define('SRT_STATE_BLANK',     3);

    $lines   = file($file);
    $subs    = array();
    $state   = SRT_STATE_SUBNUMBER;
    $subNum  = 0;
    $subText = '';
    $subTime = '';
   //
    foreach($lines as $line) {
        switch($state) {
            case SRT_STATE_SUBNUMBER:
                $subNum = trim($line);
                $state  = SRT_STATE_TIME;
                break;
            case SRT_STATE_TIME:
                $subTime = trim($line);
                $state   = SRT_STATE_TEXT;
                break;
            case SRT_STATE_TEXT:
                if (trim($line) == '') {
                    $sub = new stdClass;
                    $sub->number = $subNum;
                    list($sub->startTime, $sub->stopTime) = explode(' --> ', $subTime);
                    $sub->text   = $subText;
                    $subText     = '';
                    $state       = SRT_STATE_SUBNUMBER;
                    $subs[]      = $sub;
                } else {
                    $subText .= $line;
                }
                break;
        }
    }
    if ($state == SRT_STATE_TEXT) {
        // if file was missing the trailing newlines, we'll be in this
        // state here.  Append the last read text and add the last sub.
        $sub->text = $subText;
        $subs[] = $sub;
    }
    //insert the verses into database
    global $wpdb;
    $table_name = 'uploaded_srts';
    foreach ($subs as $key=>$subtitle) {
        $data_array = [
            'timing'=> $sub->startTime." --> ".$sub->stopTime,
            'text'=>$subtitle->text
        ];
        $result = $wpdb->insert($table_name, $data_array, $format=null);
    }
}

Step 02: Include the file in functions.php

/**
 * Functions and shortcode for upload and parsing srt file.
 */
require get_template_directory() . '/srt_parse.php';

Step 03: Make a table in your WordPress database with following SQL code

CREATE TABLE `uploaded_srts` (
  `id` int(11) NOT NULL,
  `text` varchar(300) NOT NULL,
  `timing` varchar(300) NOT NULL,
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
ALTER TABLE `uploaded_srts`
  ADD PRIMARY KEY (`id`);
ALTER TABLE `uploaded_srts`
  MODIFY `id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT;

Step 04: You have all done just add a page and add the shortcode [srt-form] and save the page. Now open the page and upload an srt file and click upload. Then check in databases all the lines of srt file have uploaded.

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How to parse an SRT file and insert it in WordPress database