PHP：嵌套数组的遍历

PHP_version = 7.4.1

遍历嵌套数组的函数:

<?php 

$embed_array = [
    "name" => [
        "TangSeng",
        "SunWukong",
        "ShaWujing"
    ],
    "work" => [
        "none1",
        "none2",
        "none3"
    ],
    
    "files" => [
        "file1",
        "file2",
        "file3" =>[
            "I am a five ...",
            "I am a five ..., too ",
            "I am a five ..., last"
        ]
    ]
];
    
    
echo $embed_array["name"][2] .PHP_EOL;    
    
var_dump($embed_array);

    
function travel_array($array){
    $sep = "";
    if (is_array($array)){
        foreach($array as $key=>$value){
            
            if(is_array($value)){
                travel_array($value);
            } else {
                $sep = $sep . "   ";
                echo $sep. $key . "=>". $value .PHP_EOL;
            }
        }
    } else {
        echo $sep . $array .PHP_EOL;
    }
}

travel_array($embed_array);    
    
?> 



 
 
 

ShaWujing
array(3) {
  ["name"]=>
  array(3) {
    [0]=>
    string(8) "TangSeng"
    [1]=>
    string(9) "SunWukong"
    [2]=>
    string(9) "ShaWujing"
  }
  ["work"]=>
  array(3) {
    [0]=>
    string(5) "none1"
    [1]=>
    string(5) "none2"
    [2]=>
    string(5) "none3"
  }
  ["files"]=>
  array(3) {
    [0]=>
    string(5) "file1"
    [1]=>
    string(5) "file2"
    ["file3"]=>
    array(3) {
      [0]=>
      string(15) "I am a five ..."
      [1]=>
      string(21) "I am a five ..., too "
      [2]=>
      string(21) "I am a five ..., last"
    }
  }
}




// output

   0=>TangSeng
      1=>SunWukong
         2=>ShaWujing
   0=>none1
      1=>none2
         2=>none3
   0=>file1
      1=>file2
   0=>I am a five ...
      1=>I am a five ..., too 
         2=>I am a five ..., last
 

function print_array(array $in){
    foreach($in as $key=>$value){
        echo " $value";
    }
    echo " ".PHP_EOL;
}