I'm using PhpStorm and I have several JSON files that are fully formatted with indents and new lines.

Is there a plugin I can get for PhpStorm that will allow me to collapse/minify all the JSON in these files?


First thought: Cannot PHP do that itself? Just citing from my memory:

$json_file = '/path/to/file.json';  /* dynamically set the name of your JSON file here */
file_put_contents($json_file,       /* Write back to disk */
  json_encode(                      /* Re-Encode to JSON */
    json_decode(                    /* Decode original JSON object */
      file_get_contents($json_file) /* Read the original JSON file from disk */

No safeguard in yet, but of course you can split that up to only write the file if no errors have occured. Reading above code bottom-up, you

  1. read the original file (including indents etc) from disk
  2. decode it to make it a PHP object (indents etc. lost here)
  3. encode it back to JSON (no intents, as they were lost in previous step – this will result in a one-line string)
  4. write the newly created (one-liner) JSON back to disk.

Put the entire thing in a loop to process all your JSON files:

foreach ( glob('/path/to/dir/*.json') as $json_file ) {

Do we really need a plugin for what can be done by a one-liner? ;)

EDIT: As ComFreek pointed out in his comment, json_decode() only deals with UTF-8. So if your files use a different charset, you might want to add a call to utf8_encode() to wrap around file_get_contents(), so the "innermost command" of above loop reads utf8_encode(file_get_contents($json_file)). for completeness:

foreach ( glob('/path/to/dir/*.json') as $json_file ) {
  • I would be careful in regards to charsets and encodings. json_decode() only deals with UTF-8 (source). If the files are already encoded in ASCII or UTF-8, the code will perfectly work. – ComFreek Jul 2 '14 at 9:28
  • @ComFreek thanks for pointing this out! I wasn't aware of this, as I usually deal with UTF8 only when it comes to JSON. Updated my answer accordingly, giving you credit of course :) – Izzy Jul 2 '14 at 12:23
  • I'm sorry to bother you again, but utf8_encode() doesn't do what you probably think it does (blame PHP). It requires the input string to be in ISO-8859-1. One must use iconv() to convert between character encodings. – ComFreek Jul 2 '14 at 12:43
  • 1
    Yeah, all those nasty details :) Well, we're on SoftwareRecs here. I didn't even recommend software, which was quite a little borderline. But we shouldn't dig to deep into programming here. Thanks again for pointing out a culprit, @ComFreek – but I guess if the OP wants to go this path and needs more details, that's rather a case for Stack Overflow then :) – Izzy Jul 2 '14 at 12:46
  • thanks, although this is not quite the solution i was looking for it should be very easy to implement. Sorry for not getting back sooner, some how real life managed to get in the way :( – mic Jul 3 '14 at 13:46

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