{"id":4807,"date":"2025-07-23T09:30:08","date_gmt":"2025-07-23T00:30:08","guid":{"rendered":"https:\/\/comcent.co.jp\/blog\/?p=4807"},"modified":"2025-03-19T13:56:24","modified_gmt":"2025-03-19T04:56:24","slug":"stable-diffusion-web-ui-%e7%94%a3%e7%94%bb%e5%83%8f%e3%81%ae-png-%e3%81%8b%e3%82%89-php-%e3%81%a7%e3%83%97%e3%83%ad%e3%83%b3%e3%83%97%e3%83%88%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e8%aa%ad%e3%81%bf","status":"publish","type":"post","link":"https:\/\/comcent.co.jp\/blog\/archives\/4807\/","title":{"rendered":"Stable Diffusion Web UI \u7523\u753b\u50cf\u306e png \u304b\u3089 PHP \u3067\u30d7\u30ed\u30f3\u30d7\u30c8\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u53d6\u308b(tEXt \u30c1\u30e3\u30f3\u30af\u306e\u8aad\u307f\u53d6\u308a)"},"content":{"rendered":"\n

Stable Diffusion \u3092\u52d5\u304b\u3059\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u3057\u3066\u4eca\u306a\u304a\u30c7\u30a3\u30d5\u30a1\u30af\u30c8\u30b9\u30bf\u30f3\u30c0\u30fc\u30c9\u3068\u547c\u3079\u308b Stable Diffusion Web UI \u3067\u3059\u304c\u3001\u751f\u6210\u3057\u305f png \u753b\u50cf\u3092\u300cPNG Info\u300d\u30bf\u30d6\u306b\u6295\u3052\u5165\u308c\u308b\u3068\u4f7f\u7528\u3057\u305f\u30d7\u30ed\u30f3\u30d7\u30c8\u3084\u4ed6\u306e\u8a2d\u5b9a\u304c\u95b2\u89a7\u3067\u304d\u307e\u3059\u3002
\u7279\u306b Stable Diffusion Web UI \u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3084\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d\u3057\u305f\u308f\u3051\u3067\u306f\u306a\u3044\u306e\u3067\u3059\u304c\u3001\u306a\u3093\u3089\u304b\u306e\u5f62\u3067 png \u30d5\u30a1\u30a4\u30eb\u306e\u8868\u793a\u3068\u306f\u95a2\u4fc2\u306a\u3044\u30e1\u30bf\u30c7\u30fc\u30bf\u90e8\u5206\u306b\u60c5\u5831\u304c\u66f8\u304d\u8fbc\u307e\u308c\u3066\u3044\u308b\u306e\u3060\u308d\u3046\u3068\u601d\u3063\u3066\u8abf\u3079\u305f\u3089\u305d\u306e\u901a\u308a\u3067\u3057\u305f\u3002
\u306a\u3089\u3070 PHP \u3067\u8aad\u307f\u8fbc\u3081\u306c\u308f\u3051\u306f\u306a\u3044\u3060\u308d\u3046\u3068\u958b\u767a\u3092\u3057\u305f\u3089\u3001\u6848\u5916\u3059\u3093\u306a\u308a\u8aad\u307f\u8fbc\u3081\u305f\u306e\u3067\u3001png \u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u629c\u304d\u51fa\u3059\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\u3061\u306a\u307f\u306b\u30e9\u30a4\u30d6\u30e9\u30ea\u306a\u3069\u306f\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002PHP: 8.2.0 \u3067\u691c\u8a3c\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\u5b9f\u969b\u306e\u30b3\u30fc\u30c9<\/h4>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u3044\u308f\u3086\u308b Controller \u90e8\u5206\u306a\u3069\u306f\u7701\u3044\u3066\u3001\u5b9f\u969b\u306b png \u753b\u50cf\u304b\u3089\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6587\u5b57\u5217 or \u914d\u5217\u306e\u5f62\u3067\u8fd4\u3059\u30af\u30e9\u30b9\u304c\u4e0b\u8a18\u3067\u3059\u3002<\/p>\n\n\n\n

<?php

namespace PngInfo;

class PngInfo
{

  \/**
   * \u6307\u5b9a\u3055\u308c\u305f png \u30d5\u30a1\u30a4\u30eb\u5185\u306b stable diffusion \u7528\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u3042\u308c\u3070\u305d\u308c\u3092\u8fd4\u3059
   * \u5b58\u5728\u3057\u306a\u3051\u308c\u3070 null \u3092\u8fd4\u3059
   * @param string $path
   * @return string|null
   *\/
  private function _getParametersString(string $path): ?string
  {
    \/\/\u305d\u3082\u305d\u3082\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f null \u3092\u8fd4\u3059
    if ( ! is_file($path))
    {
      return null;
    }

    \/\/\u30d5\u30a1\u30a4\u30eb\u3092\u30d0\u30a4\u30ca\u30ea\u30e2\u30fc\u30c9\u304b\u3064\u3001\u30dd\u30a4\u30f3\u30bf\u3092\u5148\u982d\u306b\u7f6e\u3044\u3066\u8aad\u307f\u8fbc\u307f\u958b\u59cb
    $fp = fopen($path, 'rb');

    $chu = fread($fp, 8);

    \/* PNG\u30b7\u30b0\u30cd\u30c1\u30e3\u304c\u4e00\u81f4\u3059\u308b\u304b\u30c1\u30a7\u30c3\u30af *\/
    if($chu !== \"\\x89\\x50\\x4e\\x47\\x0d\\x0a\\x1a\\x0a\")
    {
      \/\/\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u308b
      fclose($fp);

      \/\/null \u3092\u8fd4\u3059
      return null;
    }

    \/\/\u30dd\u30a4\u30f3\u30bf\u304b\u3089 8 \u30d0\u30a4\u30c8\u3076\u3093\u306e\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u8fbc\u3080
    \/\/\u30eb\u30fc\u30d7\u5185\u3067\u3082 fread \u3092\u884c\u3046\u306e\u3067\u3001\u6bce\u56de 8 \u30d3\u30c3\u30c8\u3065\u3064\u8aad\u3080\u308f\u3051\u3067\u306f\u306a\u3044
    while($chunkHeader = fread($fp, 8))
    {
      \/\/\u5148\u982d8\u30d0\u30a4\u30c8\u304b\u3089\u3001\u30c1\u30e3\u30f3\u30af\u30c7\u30fc\u30bf\u306e\u9577\u3055\u3068\u7a2e\u5225\u3092\u53d6\u5f97\u3059\u308b
      $chunk = unpack('Nsize\/a4type', $chunkHeader);

      \/\/\u30c1\u30e3\u30f3\u30af\u30c7\u30fc\u30bf\u672c\u4f53
      \/\/Note: \u30b5\u30a4\u30ba0\u306e\u5834\u5408\u3001fread\u95a2\u6570\u304c\u30a8\u30e9\u30fc\u3092\u51fa\u3059\u305f\u3081\u7a7a\u6587\u5b57\u3068\u3059\u308b
      $data = (0 < $chunk['size']) ? fread($fp, $chunk['size']) : '';

      \/\/CRC \u306f\u7279\u306b\u4f7f\u7528\u3057\u306a\u3044\u304c\u3001\u6b21\u56de\u8aad\u307f\u8fbc\u307f\u5206\u307e\u3067\u30dd\u30a4\u30f3\u30bf\u3092\u305a\u3089\u3059
      fseek($fp, 4, SEEK_CUR);

      \/\/tEXt \u3092\u898b\u3064\u3051\u305f\u3089\u8fd4\u3059
      if($chunk['type'] === \"\\x74\\x45\\x58\\x74\" && $data)
      {
        \/\/\u4e00\u65e6 hex \u5f62\u5f0f\u306b\u5909\u63db
        $hex = bin2hex($data);

        \/\/\u30bb\u30d1\u30ec\u30fc\u30bf\u3092\u63a2\u3059
        $separatorIndex = strpos($hex, '00');

        \/\/\u30bb\u30d1\u30ec\u30fc\u30bf\u304c\u7121\u3044
        if ($separatorIndex === false)
        {
          continue;
        }

        \/\/\u5148\u982d\u30d1\u30e9\u30e1\u30fc\u30bf\u304c 'parameter' \u3067\u306f\u306a\u3044
        if (substr($hex, 0, $separatorIndex) !== \"706172616d6574657273\")
        {
          continue;
        }

        \/\/\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u308b
        fclose($fp);

        \/\/\u30c7\u30fc\u30bf\u3092\u8fd4\u3059
        return hex2bin(substr($hex, $separatorIndex + 2));
      }
    }

    \/\/\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u308b
    fclose($fp);

    \/\/\u76ee\u5f53\u3066\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u7121\u3044\u306e\u3067 null \u3092\u8fd4\u3059
    return null;
  }

  \/**
   * $sting \u3092\u30ab\u30f3\u30de\u3001\u307e\u305f\u306f\u6539\u884c\u3067\u533a\u5207\u308b
   * \u7d50\u679c\u914d\u5217\u306e\u5024\u306f trim() \u3055\u308c\u305f\u3082\u306e\u3068\u306a\u308b
   * @param string $string
   * @return array
   *\/
  private function _separatePrompts(string $string): array
  {
    \/\/\u7d50\u679c\u914d\u5217
    $prompts = [];

    \/\/ \u4e00\u6642\u84c4\u7a4d\u7528\u6587\u5b57\u5217
    $temp = '';

    \/\/ \u30ab\u30f3\u30de\u3092\u533a\u5207\u308a\u3068\u8a8d\u8b58\u3057\u306a\u3044\u30d5\u30e9\u30b0
    $ignoreFlg = false;

    \/\/ \u6b21\u306e\u30eb\u30fc\u30d7\u3092\u5168\u3066\u56de\u3057\u304d\u308b\u305f\u3081\u4e00\u6587\u5b57\u4f59\u8a08\u306a\u30ab\u30f3\u30de\u3092\u8ffd\u52a0
    $string .= ',';

    \/\/ \u4e00\u6587\u5b57\u3065\u3064\u5207\u308a\u51fa\u3057\u3066\u30eb\u30fc\u30d7
    foreach (mb_str_split($string) as $char)
    {
      \/\/ < \u3060\u3063\u305f\u3089\u4ee5\u964d > \u304c\u78ba\u8a8d\u3055\u308c\u308b\u307e\u3067\u30ab\u30f3\u30de\u3092\u7121\u8996
      if ($char === '<')
      {
        $ignoreFlg = true;
      }

      \/\/ > \u3060\u3063\u305f\u3089\u4ee5\u964d < \u306b\u3088\u308b\u30ab\u30f3\u30de\u7121\u8996\u3092\u89e3\u9664
      if ($char === '>')
      {
        $ignoreFlg = false;
      }

      \/\/ \u30ab\u30f3\u30de\u7121\u8996\u4e2d\u3001\u3082\u3057\u304f\u306f\u30ab\u30f3\u30de\u3067\u306a\u3051\u308c\u3070 $temp \u306b\u6587\u5b57\u3092\u84c4\u7a4d
      if ($ignoreFlg || $char !== ',')
      {
        \/\/ \u8ffd\u52a0
        $temp .= $char;

        \/\/ \u6b21\u306e\u6587\u5b57\u3078
        continue;
      }

      \/\/ \u5909\u6570\u306e\u79fb\u3057\u66ff\u3048
      $value = $temp;

      \/\/ \u3053\u306e\u6642\u70b9\u3067\u84c4\u7a4d\u6587\u5b57\u5217\u3092\u30ea\u30bb\u30c3\u30c8
      $temp = '';

      \/\/ \u7d50\u679c\u304c\u7a7a\u767d\u306a\u3089\u4f55\u3082\u3057\u306a\u3044
      if ($value === '')
      {
        continue;
      }

      \/\/ \u7d50\u679c\u306b\u8ffd\u52a0
      $prompts[] = $value;
    }

    \/\/\u8fd4\u3059
    return $prompts;
  }

  \/**
   * \u629c\u304d\u51fa\u3057\u305f\u30d1\u30e9\u30e1\u30fc\u30bf\u6587\u5b57\u5217\u3092\u9023\u60f3\u914d\u5217\u306b\u5909\u63db\u3057\u3066\u8fd4\u3059
   * \u629c\u304d\u51fa\u3057\u306b\u5931\u6557\u3057\u305f\u5834\u5408\u306f null \u3092\u8fd4\u3059
   * @param string $string
   * @return array|null
   *\/
  private function _parseParameters(string $string): ?array
  {
    \/\/\u5b58\u5728\u3057\u306a\u3044
    if ( ! $string)
    {
      return null;
    }

    \/\/ $string \u306f '{\u30d7\u30ed\u30f3\u30d7\u30c8}\\nNegative prompt: {\u30cd\u30ac\u30c6\u30a3\u30d6\u30d7\u30ed\u30f3\u30d7\u30c8}\\n{\u305d\u306e\u307b\u304b\u306e\u30d1\u30e9\u30e1\u30fc\u30bf'}' \u3068\u3044\u3046\u69cb\u9020\u304c\u4e88\u60f3\u3055\u308c\u308b
    \/\/ \u624b\u59cb\u3081\u306b \\n \u3067\u5206\u5272\u3059\u308b
    $strings = explode(\"\\n\", $string);

    \/\/ \u30d7\u30ed\u30f3\u30d7\u30c8\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306f\u524d\u3082\u3063\u3066\u53d6\u308a\u51fa\u3057\u3066\u304a\u304f
    $positives = isset($strings[2]) ? $this->_separatePrompts($strings[0]) : [];
    $negatives = isset($strings[2]) ? $this->_separatePrompts($strings[1]) : [];

    \/\/ \u305d\u306e\u307b\u304b\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u90e8\u5206\u3092\u5b9a\u7fa9
    $parameters = $strings[2] ?? $string;

    \/\/ ([^:]+): ([^,]+)(, )? \u3067\u5206\u5272\u3057\u3001\u30ad\u30fc\u3068\u5024\u3092\u53d6\u5f97\u3059\u308b
    return preg_match_all('\/([^:]+): ([^,]+)(, )?\/', $parameters, $matches)
      ? compact('positives', 'negatives') + array_combine($matches[1], $matches[2])
      : compact('positives', 'negatives');
  }

  \/**
   * \u6307\u5b9a\u3055\u308c\u305f png \u30d5\u30a1\u30a4\u30eb\u5185\u306b stable diffusion \u7528\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u3042\u308c\u3070\u305d\u308c\u3092\u8fd4\u3059
   * \u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u5b58\u5728\u3057\u306a\u3051\u308c\u3070 null \u3092\u8fd4\u3059
   * @param string $path
   * @return string|null
   *\/
  public function getParametersString(string $path)
  {
    return $this->_getParametersString($path);
  }

  \/**
   * \u6307\u5b9a\u3055\u308c\u305f png \u30d5\u30a1\u30a4\u30eb\u5185\u306b stable diffusion \u7528\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u3042\u308c\u3070\u9023\u60f3\u914d\u5217\u306b\u3057\u3066\u8fd4\u3059
   * \u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u5b58\u5728\u3057\u306a\u3051\u308c\u3070 null \u3092\u8fd4\u3059
   * @param string $path
   * @return array|null
   *\/
  public function getParametersArray(string $path): ?array
  {
    \/\/\u6587\u5b57\u5217\u3092\u5f97\u308b
    $string = $this->_getParametersString($path);

    \/\/\u6587\u5b57\u5217\u306e\u53d6\u5f97\u306b\u5931\u6557
    if ( ! $string)
    {
      return null;
    }

    \/\/\u30d1\u30fc\u30b9
    return $this->_parseParameters($string);
  }

}
<\/pre>\n\n\n\n
png \u30d5\u30a1\u30a4\u30eb\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u69cb\u9020<\/h4>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u307e\u305a\u306f png \u30d5\u30a1\u30a4\u30eb\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u304c\u3069\u306e\u3088\u3046\u306a\u69cb\u9020\u306b\u306a\u3063\u3066\u3044\u308b\u304b\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\u8a73\u3057\u304f\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u304c\u5927\u5909\u53c2\u8003\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
https:\/\/zenn.dev\/knowledgework\/articles\/read-png-file<\/a><\/p>\n\n\n\n
\u3053\u3053\u3067\u6700\u4f4e\u9650\u899a\u3048\u3066\u304a\u304d\u305f\u3044\u306e\u306f\u3001png \u30c7\u30fc\u30bf\u306f\u5148\u982d 8 byte \u3092\u9664\u304d\u3001\u305d\u308c\u4ee5\u964d\u306f\u3059\u3079\u3066\u300c\u30c1\u30e3\u30f3\u30af\u300d\u3068\u547c\u3070\u308c\u308b\u584a\u304c\u9023\u7d9a\u3057\u3066\u30c7\u30fc\u30bf\u3092\u5f62\u4f5c\u3063\u3066\u3044\u308b\u3068\u3044\u3046\u70b9\u3067\u3059\u3002<\/p>\n\n\n\n
\u3053\u306e\u30c1\u30e3\u30f3\u30af\u306f\u3069\u3093\u306a\u30c1\u30e3\u30f3\u30af\u3067\u3042\u3063\u3066\u3082\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u69cb\u9020\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n