Question

任何人帮助我如何制作与爆炸和内爆功能相同的功能

Answer 1

让我们首先看一下爆炸的内容:(来自php.net）

返回一个字符串数组，每个字符串都是字符串的子字符串，通过在字符串分隔符形成的边界上将其拆分而形成。

表示

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'
// )

在上面的示例中，分隔符是空格，字符串是1 ... 8

同样让我们在伪代码中解决这个问题：

函数需要2个参数，分隔符和字符串
创建一个空数组
查找字符串的长度
在字符串
从字符串中取出子字符串，直到分隔符的第一个位置
将子字符串存储在数组
重复步骤3-6，直到字符串长度为零。
返回数组

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'
// )

Answer 2

<?
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;
}

如何使一个与爆炸和内爆功能相同的功能

2 个答案: