<?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' => "脚本之家", '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
}
}
**/
?>
PS:这里再为大家推荐几款比较实用的json在线工具供大家参考使用:
在线JSON代码检验、检验、美化、格式化工具:
http://tools.jb51.net/code/json
JSON在线格式化工具:
http://tools.jb51.net/code/jsonformat
在线XML/JSON互相转换工具:
http://tools.jb51.net/code/xmljson
json代码在线格式化/美化/压缩/编辑/转换工具:
http://tools.jb51.net/code/jsoncodeformat
C语言风格/HTML/CSS/json代码格式化美化工具:
http://tools.jb51.net/code/ccode_html_css_json
<a href="?action=up&id=200">上一篇</a>
<a href="?action=down&id=200">下一篇</a>
如果是实现上一篇就在action=up页面写函数
$id= $_GET['id'];
//上一篇:
$sql= select * from article where id < '.$id.' order by id desc limit 0,1';
$rs= mysql_query($sql);
$row= mysql_fetch_array ($rs);
//下一篇:
$sql= select * from article where id < '.$id.' order by id asc limit 0,1';
$rs= mysql_query($sql);
$row= mysql_fetch_array ($rs);
原理,查询比当前ID小(where id < '.$id.'上一篇)和比当前ID大(where id > '.$id.'下一篇)的1条(limit 0,1)数据,并按降序(desc,上一篇)和升序(asc,下一篇)显示出来,当只取一篇的时候,可以省略降序或升序。