如何使這項工作同樣功能的爆炸和內爆功能

Question

任何人都幫我如何使這項工作一樣爆炸的功能和內爆功能

Answer 1

<? 
function my_implode($array, $delimiter){  
    end($array); //Set the internal pointer of an array to its last element 
    $end = key($array); // Fetch a key from the array 
    $final_string = ""; 
    foreach ($array as $key => $value) { 
     $final_string .= $value; // adds to the string. 
     if($key != $end) $final_string .= $delimiter; //If not end of array adds the delimiter to the string 
    } 

    return $final_string; 
} 

function my_explode($string, $delimiter){  
    $array = preg_split("/".$delimiter."/", $string); 
    return $array; 
} 

// test explode/implode: 

$string = "this is string djhf sjs jkdfh skjfjdsf hkdsjfh kjsd fhks"; 
$delimiter = " "; 
$array = my_explode($string, $delimiter); 

echo "<br>Test Explode, <br><b>String:</b> ".$string."<br><br>"; 
echo "<b>Result:</b><br>"; 
echo "<pre>"; 
print_r($array); 
echo "</pre>"; 

echo "<br><br><br>"; 

echo "<br>Test Implode:<br><br>"; 
$string_final = my_implode($array, " ") ; 
echo "Result:<br>". $string_final; 
echo "<br><br><br>"; 
if ($string == $string_final) { 

    echo "<b>Test Successful.</b> <br> <br>Original String: <br>".$string. "<br>Final String:<br>". $string_final; 
    echo "<b><br>String are identical</b>"; 
} else { 
    Echo "<b>Test Failed!</b> <br><br>Original String:<br>".$string. "<br>Final String:<br>". $string_final; 
} 

Answer 2

讓我們先看看簡單的術語是什麼爆炸做:(從php.net）

返回一個字符串數組，其中每個字符串是一個字符串的子字符串形成的字符串分割由字符串分隔符形成的邊界。

這意味着

explode(' ', '1 2 3 4 5 6 7 8'); // will return the array of strings 
// array(
// 0 => '1', 
// 1 => '2', 
// 2 => '3', 
// 3 => '4', 
// 4 => '5', 
// 5 => '6', 
// 6 => '7', 
// 7 => '8' 
//) 

在上面的例子中，分隔符是空白和該字符串是1 ... 8

同樣允許在僞代碼打破了這一點：

1. 函數需要2個參數，分隔符和字符串
2. 創建一個空數組
3. 查找字符串的長度
4. 查找字符串中的定界符的第一位置
5. 取子串從字符串直到定界符
6. 存儲中的子串的陣列中的第一位置
7. 重複步驟3-6，直到字符串長度爲零。
8. 返回陣列

 

function letsExplode(String $delimiter, String $string): array 
{ 
    $arr = []; 
    while(strlen($string) > 0) 
    { 
    $pos = strpos($string, $delimiter); 
    if($pos) 
    { 
     $arr[] = trim(substr($string, 0, $pos)); 
     $string = ltrim(substr($string, $pos), $delimiter); 
    } else { 
     $arr[] = trim($string); 
     $string = ''; 
    } 
    } 
    return $arr; 
} 

letsExplode(' ', '1 2 3 4 5 6 7 8'); or letsExplode(',', '1, 2, 3, 4, 5, 6, 7, 8'); 
// array(
// 0 => '1', 
// 1 => '2', 
// 2 => '3', 
// 3 => '4', 
// 4 => '5', 
// 5 => '6', 
// 6 => '7', 
// 7 => ' 8' 
//)