我正在构建一个PHP脚本，将JSON数据提供给另一个脚本。我的脚本将数据构建到一个大型关联数组中，然后使用json_encode输出数据。下面是一个脚本示例:
$data = array('a' => 'apple', 'b' => 'banana', 'c' => 'catnip');
header('Content-type: text/javascript');
echo json_encode($data);
上面的代码产生如下输出:
{"a":"apple","b":"banana","c":"catnip"}
如果你有少量的数据，这是很好的，但我更喜欢这样的东西:
{
"a": "apple",
"b": "banana",
"c": "catnip"
}
有没有办法在PHP中做到这一点，而不需要丑陋的黑客?似乎Facebook的某个人发现了这一点。
当前回答
我通常会用这些简单的语句。
如果你已经有一个JSON字符串，你可以简单地使用echo()和print_r()的组合。 不要忘记将print_r()的第二个参数传递给true，以便它返回值而不是打印它:
echo('<pre>' . print_r($json, true) . '</pre>');
或者你可以使用die()，这对调试很方便:
die('<pre>' . print_r($json, true) . '</pre>');
如果您有一个数组，您需要在之前将其转换为JSON字符串。 请确保使用JSON_PRETTY_PRINT标志设置json_encode()的第二个参数，这样您的JSON将被正确呈现:
echo('<pre>' . print_r(json_encode($array, JSON_PRETTY_PRINT), true) . '</pre>');
或者用于调试:
die('<pre>' . print_r(json_encode($array, JSON_PRETTY_PRINT), true) . '</pre>');
其他回答
这是我自己使用的函数，api就像json_encode，除了它有第三个参数exclude_flags，以防你想排除一些默认标志(如JSON_UNESCAPED_SLASHES)
function json_encode_pretty($data, int $extra_flags = 0, int $exclude_flags = 0): string
{
// prettiest flags for: 7.3.9
$flags = JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | (defined("JSON_UNESCAPED_LINE_TERMINATORS") ? JSON_UNESCAPED_LINE_TERMINATORS : 0) | JSON_PRESERVE_ZERO_FRACTION | (defined("JSON_THROW_ON_ERROR") ? JSON_THROW_ON_ERROR : 0);
$flags = ($flags | $extra_flags) & ~ $exclude_flags;
return (json_encode($data, $flags));
}
1 - json_encode($rows,JSON_PRETTY_PRINT);返回带有换行符的美化数据。这对于命令行输入很有帮助，但正如您所发现的那样，在浏览器中看起来不那么漂亮。浏览器将接受换行符作为源(因此，查看页面源确实会显示漂亮的JSON)，但它们并不用于在浏览器中格式化输出。浏览器需要HTML。
2 -使用这个功能github
<?php
/**
* Formats a JSON string for pretty printing
*
* @param string $json The JSON to make pretty
* @param bool $html Insert nonbreaking spaces and <br />s for tabs and linebreaks
* @return string The prettified output
* @author Jay Roberts
*/
function _format_json($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 '[':
case '{':
$tabcount++;
$result .= $char . $newline . str_repeat($tab, $tabcount);
break;
case ']':
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 $result;
}
我从Composer: https://github.com/composer/composer/blob/master/src/Composer/Json/JsonFile.php和nicejson: https://github.com/GerHobbelt/nicejson-php/blob/master/nicejson.php中获取代码 Composer代码很好，因为它从5.3到5.4的更新很流畅，但它只编码对象，而nicejson需要json字符串，所以我合并了它们。代码可以用来格式化json字符串和/或编码对象，我目前在Drupal模块中使用它。
if (!defined('JSON_UNESCAPED_SLASHES'))
define('JSON_UNESCAPED_SLASHES', 64);
if (!defined('JSON_PRETTY_PRINT'))
define('JSON_PRETTY_PRINT', 128);
if (!defined('JSON_UNESCAPED_UNICODE'))
define('JSON_UNESCAPED_UNICODE', 256);
function _json_encode($data, $options = 448)
{
if (version_compare(PHP_VERSION, '5.4', '>='))
{
return json_encode($data, $options);
}
return _json_format(json_encode($data), $options);
}
function _pretty_print_json($json)
{
return _json_format($json, JSON_PRETTY_PRINT);
}
function _json_format($json, $options = 448)
{
$prettyPrint = (bool) ($options & JSON_PRETTY_PRINT);
$unescapeUnicode = (bool) ($options & JSON_UNESCAPED_UNICODE);
$unescapeSlashes = (bool) ($options & JSON_UNESCAPED_SLASHES);
if (!$prettyPrint && !$unescapeUnicode && !$unescapeSlashes)
{
return $json;
}
$result = '';
$pos = 0;
$strLen = strlen($json);
$indentStr = ' ';
$newLine = "\n";
$outOfQuotes = true;
$buffer = '';
$noescape = true;
for ($i = 0; $i < $strLen; $i++)
{
// Grab the next character in the string
$char = substr($json, $i, 1);
// Are we inside a quoted string?
if ('"' === $char && $noescape)
{
$outOfQuotes = !$outOfQuotes;
}
if (!$outOfQuotes)
{
$buffer .= $char;
$noescape = '\\' === $char ? !$noescape : true;
continue;
}
elseif ('' !== $buffer)
{
if ($unescapeSlashes)
{
$buffer = str_replace('\\/', '/', $buffer);
}
if ($unescapeUnicode && function_exists('mb_convert_encoding'))
{
// http://stackoverflow.com/questions/2934563/how-to-decode-unicode-escape-sequences-like-u00ed-to-proper-utf-8-encoded-cha
$buffer = preg_replace_callback('/\\\\u([0-9a-f]{4})/i',
function ($match)
{
return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE');
}, $buffer);
}
$result .= $buffer . $char;
$buffer = '';
continue;
}
elseif(false !== strpos(" \t\r\n", $char))
{
continue;
}
if (':' === $char)
{
// Add a space after the : character
$char .= ' ';
}
elseif (('}' === $char || ']' === $char))
{
$pos--;
$prevChar = substr($json, $i - 1, 1);
if ('{' !== $prevChar && '[' !== $prevChar)
{
// If this character is the end of an element,
// output a new line and indent the next line
$result .= $newLine;
for ($j = 0; $j < $pos; $j++)
{
$result .= $indentStr;
}
}
else
{
// Collapse empty {} and []
$result = rtrim($result) . "\n\n" . $indentStr;
}
}
$result .= $char;
// If the last character was the beginning of an element,
// output a new line and indent the next line
if (',' === $char || '{' === $char || '[' === $char)
{
$result .= $newLine;
if ('{' === $char || '[' === $char)
{
$pos++;
}
for ($j = 0; $j < $pos; $j++)
{
$result .= $indentStr;
}
}
}
// If buffer not empty after formating we have an unclosed quote
if (strlen($buffer) > 0)
{
//json is incorrectly formatted
$result = false;
}
return $result;
}
把几个答案粘在一起适合我对现有json的需求:
Code:
echo "<pre>";
echo json_encode(json_decode($json_response), JSON_PRETTY_PRINT);
echo "</pre>";
Output:
{
"data": {
"token_type": "bearer",
"expires_in": 3628799,
"scopes": "full_access",
"created_at": 1540504324
},
"errors": [],
"pagination": {},
"token_type": "bearer",
"expires_in": 3628799,
"scopes": "full_access",
"created_at": 1540504324
}
print_r PHP的漂亮打印
PHP示例
function print_nice($elem,$max_level=10,$print_nice_stack=array()){
if(is_array($elem) || is_object($elem)){
if(in_array($elem,$print_nice_stack,true)){
echo "<font color=red>RECURSION</font>";
return;
}
$print_nice_stack[]=&$elem;
if($max_level<1){
echo "<font color=red>nivel maximo alcanzado</font>";
return;
}
$max_level--;
echo "<table border=1 cellspacing=0 cellpadding=3 width=100%>";
if(is_array($elem)){
echo '<tr><td colspan=2 style="background-color:#333333;"><strong><font color=white>ARRAY</font></strong></td></tr>';
}else{
echo '<tr><td colspan=2 style="background-color:#333333;"><strong>';
echo '<font color=white>OBJECT Type: '.get_class($elem).'</font></strong></td></tr>';
}
$color=0;
foreach($elem as $k => $v){
if($max_level%2){
$rgb=($color++%2)?"#888888":"#BBBBBB";
}else{
$rgb=($color++%2)?"#8888BB":"#BBBBFF";
}
echo '<tr><td valign="top" style="width:40px;background-color:'.$rgb.';">';
echo '<strong>'.$k."</strong></td><td>";
print_nice($v,$max_level,$print_nice_stack);
echo "</td></tr>";
}
echo "</table>";
return;
}
if($elem === null){
echo "<font color=green>NULL</font>";
}elseif($elem === 0){
echo "0";
}elseif($elem === true){
echo "<font color=green>TRUE</font>";
}elseif($elem === false){
echo "<font color=green>FALSE</font>";
}elseif($elem === ""){
echo "<font color=green>EMPTY STRING</font>";
}else{
echo str_replace("\n","<strong><font color=red>*</font></strong><br>\n",$elem);
}
}
