search
HomeBackend DevelopmentPHP TutorialA brief discussion on the method of formatting PHP json data

this article will introduce you to the method of formatting php json data. it has certain reference value. friends in need can refer to it. i hope it will be helpful to everyone.

A brief discussion on the method of formatting PHP json data

php's json_encode can convert the array into a string in json format. the string is not indented, and chinese characters will be converted to unicode encoding, such as \u975a\u4ed4. it is difficult for people to read.

now this method is beautified again based on json_encode. make it easier for people to read the content.

1. use json_encode output

<?php  
  
header('content-type:application/json;charset=utf8');  
  
$arr = array(  
    'status' => true,  
    'errmsg' => '',  
    'member' =>array(  
        array(  
            'name' => '张三',  
            'gender' => '男'  
        ),  
        array(  
            'name' => '李四',  
            'gender' => '女'  
        )  
    )  
);  
  
echo json_encode($arr);  
  
?>

output:

{"status":true,"errmsg":"","member":[{"name":"\u674e\u900d\u9065","gender":"\u7537"},{"name":"\u8d75\u7075\u513f","gender":"\u5973"}]}  

it can be seen that this format is very difficult for people to read.

2. use jsonformat to output

<?php  
  
/** json数据格式化 
* @param  mixed  $data   数据 
* @param  string $indent 缩进字符,默认4个空格 
* @return json 
*/  
function jsonformat($data, $indent=null){  
  
    // 对数组中每个元素递归进行urlencode操作,保护中文字符  
    array_walk_recursive($data, 'jsonformatprotect');  
  
    // json encode  
    $data = json_encode($data);  
  
    // 将urlencode的内容进行urldecode  
    $data = urldecode($data);  
  
    // 缩进处理  
    $ret = '';  
    $pos = 0;  
    $length = strlen($data);  
    $indent = isset($indent)? $indent : '    ';  
    $newline = "\n";  
    $prevchar = '';  
    $outofquotes = true;  
  
    for($i=0; $i<=$length; $i++){  
  
        $char = substr($data, $i, 1);  
  
        if($char=='"' && $prevchar!='\\'){  
            $outofquotes = !$outofquotes;  
        }elseif(($char=='}' || $char==']') && $outofquotes){  
            $ret .= $newline;  
            $pos --;  
            for($j=0; $j<$pos; $j++){  
                $ret .= $indent;  
            }  
        }  
  
        $ret .= $char;  
          
        if(($char==',' || $char=='{' || $char=='[') && $outofquotes){  
            $ret .= $newline;  
            if($char=='{' || $char=='['){  
                $pos ++;  
            }  
  
            for($j=0; $j<$pos; $j++){  
                $ret .= $indent;  
            }  
        }  
  
        $prevchar = $char;  
    }  
  
    return $ret;  
}  
  
/** 将数组元素进行urlencode 
* @param string $val 
*/  
function jsonformatprotect(&$val){  
    if($val!==true && $val!==false && $val!==null){  
        $val = urlencode($val);  
    }  
}  
  
header('content-type:application/json;charset=utf8');  
  
$arr = array(  
    'status' => true,  
    'errmsg' => '',  
    'member' =>array(  
        array(  
            'name' => '张三',  
            'gender' => '男'  
        ),  
        array(  
            'name' => '李四',  
            'gender' => '女'  
        )  
    )  
);  
  
echo jsonformat($arr);  
  
?>  

output:

{  
    "status":true,  
    "errmsg":"",  
    "member":[  
        {  
            "name":"张三",  
            "gender":"男"  
        },  
        {  
            "name":"李四",  
            "gender":"女"  
        }  
    ]  
}

after php5.4, json_encode adds json_unescaped_unicode, json_pretty_print, etc. a constant parameter. make displaying chinese and formatting more convenient.

header('content-type:application/json;charset=utf8');    
    
$arr = array(    
    'status' => true,    
    'errmsg' => '',    
    'member' =>array(    
        array(    
            'name' => '张三',    
            'gender' => '男'    
        ),    
        array(    
            'name' => '李四',    
            'gender' => '女'    
        )    
    )    
);    
    
echo json_encode($arr, json_unescaped_unicode|json_pretty_print);  

output:

{  
    "status": true,  
    "errmsg": "",  
    "member": [  
        {  
            "name": "张三",  
            "gender": "男"  
        },  
        {  
            "name": "李四",  
            "gender": "女"  
        }  
    ]  
}

json constant parameter description: the following constants represent the error type returned by json_last_error().

json_error_none (integer)

no error occurred. effective as of php 5.3.0.

json_error_depth (integer)

the maximum stack depth has been reached. effective as of php 5.3.0.

json_error_state_mismatch (integer)

an underflow or pattern mismatch occurred. effective as of php 5.3.0.

json_error_ctrl_char (integer)

the control character is wrong, maybe the encoding is wrong. effective as of php 5.3.0.

json_error_syntax (integer)

syntax error. effective as of php 5.3.0.

json_error_utf8 (integer)

exceptional utf-8 characters, perhaps due to incorrect encoding. this constant is available since php 5.3.1.

the following constants can be used in conjunction with the form option of json_encode().

json_hex_tag (integer)

all are converted to \u003c and \u003e. effective as of php 5.3.0.

json_hex_amp (integer)

all &s are converted to \u0026. effective as of php 5.3.0.

json_hex_apos (integer)

all ' are converted to \u0027. effective as of php 5.3.0.

json_hex_quot (integer)

all " are converted to \u0022. effective since php 5.3.0.

json_force_object (integer)

causes a non-associative array to output a class (object) instead of an array. in the array: especially useful when empty and the receiver requires an object. effective as of php 5.3.0.

json_numeric_check (integer)

encode all numeric strings into numbers. effective as of php 5.3.3 .

json_bigint_as_string (integer)

encode large numbers into the original value of the original character. effective since php 5.4.0.

json_pretty_print (integer)

format the returned data with whitespace characters. since php 5.4.0 effective as of php 5.4.0.

json_unescaped_slashes (integer)

do not encode /. effective as of php 5.4.0.

JSON_UNESCAPED_UNICODE (integer)

encode multibyte unicode characters literally (the default is to encode \uxxxx). since php effective from 5.4.0.

recommended learning: "php video tutorial" p>

Statement
This article is reproduced at:CSDN. If there is any infringement, please contact admin@php.cn delete
How can you check if a PHP session has already started?How can you check if a PHP session has already started?Apr 30, 2025 am 12:20 AM

In PHP, you can use session_status() or session_id() to check whether the session has started. 1) Use the session_status() function. If PHP_SESSION_ACTIVE is returned, the session has been started. 2) Use the session_id() function, if a non-empty string is returned, the session has been started. Both methods can effectively check the session state, and choosing which method to use depends on the PHP version and personal preferences.

Describe a scenario where using sessions is essential in a web application.Describe a scenario where using sessions is essential in a web application.Apr 30, 2025 am 12:16 AM

Sessionsarevitalinwebapplications,especiallyfore-commerceplatforms.Theymaintainuserdataacrossrequests,crucialforshoppingcarts,authentication,andpersonalization.InFlask,sessionscanbeimplementedusingsimplecodetomanageuserloginsanddatapersistence.

How can you manage concurrent session access in PHP?How can you manage concurrent session access in PHP?Apr 30, 2025 am 12:11 AM

Managing concurrent session access in PHP can be done by the following methods: 1. Use the database to store session data, 2. Use Redis or Memcached, 3. Implement a session locking strategy. These methods help ensure data consistency and improve concurrency performance.

What are the limitations of using PHP sessions?What are the limitations of using PHP sessions?Apr 30, 2025 am 12:04 AM

PHPsessionshaveseverallimitations:1)Storageconstraintscanleadtoperformanceissues;2)Securityvulnerabilitieslikesessionfixationattacksexist;3)Scalabilityischallengingduetoserver-specificstorage;4)Sessionexpirationmanagementcanbeproblematic;5)Datapersis

Explain how load balancing affects session management and how to address it.Explain how load balancing affects session management and how to address it.Apr 29, 2025 am 12:42 AM

Load balancing affects session management, but can be resolved with session replication, session stickiness, and centralized session storage. 1. Session Replication Copy session data between servers. 2. Session stickiness directs user requests to the same server. 3. Centralized session storage uses independent servers such as Redis to store session data to ensure data sharing.

Explain the concept of session locking.Explain the concept of session locking.Apr 29, 2025 am 12:39 AM

Sessionlockingisatechniqueusedtoensureauser'ssessionremainsexclusivetooneuseratatime.Itiscrucialforpreventingdatacorruptionandsecuritybreachesinmulti-userapplications.Sessionlockingisimplementedusingserver-sidelockingmechanisms,suchasReentrantLockinJ

Are there any alternatives to PHP sessions?Are there any alternatives to PHP sessions?Apr 29, 2025 am 12:36 AM

Alternatives to PHP sessions include Cookies, Token-based Authentication, Database-based Sessions, and Redis/Memcached. 1.Cookies manage sessions by storing data on the client, which is simple but low in security. 2.Token-based Authentication uses tokens to verify users, which is highly secure but requires additional logic. 3.Database-basedSessions stores data in the database, which has good scalability but may affect performance. 4. Redis/Memcached uses distributed cache to improve performance and scalability, but requires additional matching

Define the term 'session hijacking' in the context of PHP.Define the term 'session hijacking' in the context of PHP.Apr 29, 2025 am 12:33 AM

Sessionhijacking refers to an attacker impersonating a user by obtaining the user's sessionID. Prevention methods include: 1) encrypting communication using HTTPS; 2) verifying the source of the sessionID; 3) using a secure sessionID generation algorithm; 4) regularly updating the sessionID.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.