A brief discussion on the method of formatting PHP json data-PHP Tutorial-php.cn

A brief discussion on the method of formatting PHP json data

PHPz

Release： 2021-05-31 11:17:21

forward

5395 people have browsed it

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);  
  
?>

Copy after login

output:

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

Copy after login

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);  
  
?>

Copy after login

output:

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

Copy after login

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);

Copy after login

output:

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

Copy after login

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

json_error_none (integer)

Copy after login

no error occurred. effective as of php 5.3.0.

json_error_depth (integer)

Copy after login

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

json_error_state_mismatch (integer)

Copy after login

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

json_error_ctrl_char (integer)

Copy after login

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

json_error_syntax (integer)

Copy after login

syntax error. effective as of php 5.3.0.

json_error_utf8 (integer)

Copy after login

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)

Copy after login

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

json_hex_amp (integer)

Copy after login

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

json_hex_apos (integer)

Copy after login

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

json_hex_quot (integer)

Copy after login

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

json_force_object (integer)

Copy after login

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.