PHP自訂函數格式化json資料執行個體

這篇文章主要介紹了PHP自訂函數格式化json資料的方法,結合執行個體形式分析了php通過自訂函數進行字串與數組的遍曆、轉換、計算等操作實現json資料格式化的功能,需要的朋友可以參考下

具體如下：

<?php  /**   * Formats a JSON string for pretty printing   *   * @param string $json The JSON to make pretty   * @param bool $html Insert nonbreaking spaces and <br />s for tabs and linebreaks   * @return string The prettified output   */$arr = array("ret"=>0,"data"=>array('a' => 1, 'b' => "指令碼之家", 'c' => 3, 'd' => 4, 'e' => 5));$json = json_encode($arr);function _format_json($json, $html = false) {    $tabcount = 0;    $result = '';    $inquote = false;    $ignorenext = false;    if ($html) {      $tab = "   ";      $newline = "<br/>";    } else {      $tab = "\t";      $newline = "\n";    }    for($i = 0; $i < strlen($json); $i++) {      $char = $json[$i];      if ($ignorenext) {        $result .= $char;        $ignorenext = false;      } else {        switch($char) {          case '{':            $tabcount++;            $result .= $char . $newline . str_repeat($tab, $tabcount);            break;          case '}':            $tabcount--;            $result = trim($result) . $newline . str_repeat($tab, $tabcount) . $char;            break;          case ',':            $result .= $char . $newline . str_repeat($tab, $tabcount);            break;          case '"':            $inquote = !$inquote;            $result .= $char;            break;          case '\\':            if ($inquote) $ignorenext = true;            $result .= $char;            break;          default:            $result .= $char;        }      }    }    return $result;  }echo _format_json($json);/*{  "ret": 0,  "data": {    "a": 1,    "b": "\u811a\u672c\u4e4b\u5bb6",    "c": 3,    "d": 4,    "e": 5  }}**/?>

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