本文实例讲述了php自定义函数格式化json数据的方法。分享给大家供大家参考，具体如下：
<?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' => "硕编程", '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": "u811au672cu4e4bu5bb6",
"c": 3,
"d": 4,
"e": 5
}
}
**/
?>
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