怎么新建MySQL数据库

implode 使用一个字符串将数组变成字符串

<?php

$array = array('lastname', 'email', 'phone');
$comma_separated = implode(",", $array);

echo $comma_separated; // lastname,email,phone

// Empty string when using an empty array:
var_dump(implode('hello', array())); // string(0) ""

?> 

 explode — 使用一个字符串分割另一个字符串，返回一个数组

<?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; // *

?> 

 这里如果字符串没有任何符号可以进行分割的话，就需要考虑别的方法了

str_split — 将字符串转换为数组

<?php

$str = "Hello Friend";

$arr1 = str_split($str);
$arr2 = str_split($str, 3);

print_r($arr1);
print_r($arr2);

?> 
输出结果
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
)

 如果不兼容的话，就只有考虑别的方法了，将字符串逐位进行打断,

这里是一串对半角的假名的枚举
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;
    	
    }
    
    
这是一段匹配的法则，注意这里是i +=2,因为一个文字占2位
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 '$str_cut='.$str_cut.'<br>';
        $check_sucess = kana_Perl($str_cut);
        if(!$check_sucess){
        	break;
        }
		

	}
    return $check_sucess;
}

没有规律的数组转化为字符串

function substr_cut($katakana){
    $i_end = 1; //打断位数长度，分清楚英文和中文
    $check_sucess = array();
    for($i_start=0; $i_start < strlen($katakana); $i_start=$i_start+1){        
        $str_cut = substr($katakana,$i_start,$i_end);
        $check_sucess[$i_start] = $str_cut;
        echo '$str_cut='.$str_cut.'<br>';
    }
    return $check_sucess;
}