Question

PHP代码：

$b = 1;
$ab = 100;

for ($b; $b < $ab; $b++)
{
    $len = strlen($b);
    $c = 0;
    for ($c; $c < $len; $c++)
    {
        $split = str_split($b);

        if ($split[$c] == 5)
        {
            echo $b . ',';
        }
    }
}

结果是：

 5,15,25,35,45,50,51,52,53,54,55,55,56,57,58,59,65,75,85,95,

但我想删除最后一个逗号并获取最后一个值。

Answer 1

已完成更改。

1。定义$result=array();;

2。数组$result[]= $b;

中的存储值

3。以, $result= implode(",", $result);隐藏数组

PHP code demo

<?php

$b = 1;
$ab = 100;
$result=array();

for ($b; $b < $ab; $b++)
{
    $len = strlen($b);
    $c = 0;
    for ($c; $c < $len; $c++)
    {
        $split = str_split($b);

        if ($split[$c] == 5)
        {
            $result[]= $b;
        }
    }
}
$lastElement =end($result);//last element
$result=  implode(",", $result);
print_r($result);

Answer 2

有两种方法。您可以使用数组中的所有值，也可以将字符串转换为数组第一种方式是

$b = 1;
    $ab = 100;
    $arr=[];

    for($b; $b < $ab; $b++){
        $len = strlen($b);
        $c = 0;
        for($c; $c < $len; $c++){
            $split = str_split($b);

            if($split[$c] == 5){
                $arr[]=$b;//push value into the array
            }
       }  
    }
     echo implode(",",$arr);//create string from array
    echo end($arr);// return the last value of a array

第二种方式是

$b = 1;
    $ab = 100;
    $str="";

    for($b; $b < $ab; $b++){
        $len = strlen($b);
        $c = 0;
        for($c; $c < $len; $c++){
            $split = str_split($b);

            if($split[$c] == 5){
              $str .=$b .','; //create a string with name str
            }
       }  
    }
    $str=rtrim($str,','); //remove last comma of this string
    echo $str;
    $arr=explode(",",$str);//convert string to array
    echo end($arr);//return the last value of this array

Answer 3

使用rtrim然后爆炸来获取数组。

 $b = 1;
 $ab = 100;

 for($b; $b < $ab; $b++){
    $len = strlen($b);
    $c = 0;
    for($c; $c < $len; $c++){
       $split = str_split($b);

       if($split[$c] == 5){
          echo $b .','; 
       }
    }  
 }

 $b = rtrim(',',$b);
 $b = explode(',',$b);
 $b = $b[count($b)-1];

Answer 4

这将删除最后一个昏迷，并为您提供最后一个值（作为字符串）。您始终可以将字符串更改回整数。

$b = 1;
$ab = 100;
$string = "";

for($b; $b < $ab; $b++){
    $len = strlen($b);
    $c = 0;
    for($c; $c < $len; $c++){
        $split = str_split($b);

        if($split[$c] == 5){
           $string .= $b .','; 
        }
   }  
}

$string = trim($string,",");
$pos = strripos($string,",");
echo substr($string,$pos + 1);

Answer 5

只需定义最后一个变量：

$b = 1;
$ab = 100;
$last = 0;
for($b; $b < $ab; $b++){
    $len = strlen($b);
    $c = 0;
    for($c; $c < $len; $c++){
        $split = str_split($b);

        if($split[$c] == 5){
           if($last > 0){
               echo ',';
           }
           echo $b; 
           $last = $b;
        }
   }  
}

每次都在$last。

中输入最后一个值

对于昏迷，它会检查$last > 0是否$b

之前的昏迷

Answer 6

您也可以使用这些代码。测试它并且它有效。

$b = 1;
$ab = 100;
$hasValue = false;
for($b; $b < $ab; $b++){
    $hasFive = false;
    $len = strlen($b);
    $c = 0;
    for($c; $c < $len; $c++){
        $split = str_split($b);

        if($split[$c] == 5){
            $hasFive = true; 
        }
    } 

  if (!$hasValue && $hasFive) {
      echo $b;
      $hasValue = true;
   }else if($hasFive){
      echo ','.$b;
   }
}

Answer 7

$b = 1;
$ab = 100;
$hasValue = false;
for($b; $b < $ab; $b++){
    $hasFive = false;
    $len = strlen($b);
    $c = 0;
    for($c; $c < $len; $c++){
        $split = str_split($b);

        if($split[$c] == 5){
            $hasFive = true; 
        }
    } 

  if (!$hasValue && $hasFive) {
      echo $b;
      $hasValue = true;
   }else if($hasFive){
      echo ','.$b;
   }
}

如何使用for循环获取逗号分隔值和最终值？

7 个答案: