How to convert php string to array

php String to array method: First create a PHP sample file; then use the explode function to split a string and return an array, or use the "str_split" function to convert the string into an array.

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php string to array method:

explode — Use one string to split another string and return an array

<?php
// 示例 1
$pizza  = "piece1 piece2 piece3 piece4 piece5 piece6";
$pieces = explode(" ", $pizza);
echo $pieces[0]; // piece1
echo $pieces[1]; // piece2
 
// 示例 2
$data = "foo:*:1023:1000::/home/foo:/bin/sh";
list($user, $pass, $uid, $gid, $gecos, $home, $shell) = explode(":", $data);
echo $user; // foo
echo $pass; // *
 
?>

Here if the string If there is no symbol to split, you need to consider other methods

str_split - Convert the string to an array

<?php
 
$str = "Hello Friend";
 
$arr1 = str_split($str);
$arr2 = str_split($str, 3);
 
print_r($arr1);
print_r($arr2);
 
?>

Output result

Array
(
    [0] => H
    [1] => e
    [2] => l
    [3] => l
    [4] => o
    [5] =>
    [6] => F
    [7] => r
    [8] => i
    [9] => e
    [10] => n
    [11] => d
)
 
Array
(
    [0] => Hel
    [1] => lo
    [2] => Fri
    [3] => end
)

If it is incompatible, The only other way to consider is to break the string bit by bit.

Here is a manual method to break the string, which is a method originally used to verify Japanese half-width kana.

Here is an enumeration of half-width pseudonyms

function kana_Perl($katakana){
         
    $katakana_array = array(
        1=>"ｱ",2=>"ｲ",3=>"ｳ",4=>"ｴ",5=>"ｵ",
         
        6=>"ｶ",7=>"ｷ",8=>"ｸ",9=>"ｹ",10=>"ｺ",
         
        11=>"ｻ",12=>"ｼ",13=>"ｽ",14=>"ｾ",15=>"ｿ",
         
        16=>"ﾀ",17=>"ﾁ",18=>"ﾂ",19=>"ﾃ",20=>"ﾄ",
         
        21=>"ﾅ",22=>"ﾆ",23=>"ﾇ",24=>"ﾈ",25=>"ﾉ",
         
        26=>"ﾊ",27=>"ﾋ",28=>"ﾌ",29=>"ﾍ",30=>"ﾎ",
         
        31=>"ﾏ",32=>"ﾐ",33=>"ﾑ",34=>"ﾒ",35=>"ﾓ",
         
        36=>"ﾔ",37=>"ﾕ",38=>"ﾖ",
         
        39=>"ﾗ",40=>"ﾘ",41=>"ﾙ",42=>"ﾚ",43=>"ﾛ",
         
        44=>"ﾜ",45=>"ｦ",46=>"ﾝ",
     
        47=>"ｧ",48=>"ｨ",49=>"ｩ",50=>"ｪ",51=>"ｫ",
         
        52=>"ｬ",53=>"ｭ",54=>"ｮ",55=>"ｯ",56=>"､",
         
        57=>"｡",58=>"ｰ",59=>"ﾞ",60=>"ﾟ"
        );
         
         $check_result   = array_search($katakana,$katakana_array);
          
         return $check_result;
         
    }

This is a matching rule. Note that i = 2 here, because one text occupies 2 bits

function substr_cut($katakana){
    $i_end = 2;
    $check_sucess = "";
    for($i_start=0; $i_start < strlen($katakana); $i_start=$i_start+2){
         
        $str_cut = substr($katakana,$i_start,$i_end);
        echo &#39;$str_cut=&#39;.$str_cut.&#39;<br>&#39;;
        $check_sucess = kana_Perl($str_cut);
        if(!$check_sucess){
            break;
        }
         
 
    }
    return $check_sucess;
}

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