php数组在多个数组中选择一个键值并更改它们

问题描述：

is there a simple solution I can put inside a function to resolve the following:

I have multiple arrays as follows:

Array
(
[0] => A
[1] => 100_1
[2] => 1
[3] => 1184
[4] => 0
)

Array
(
[0] => A
[1] => 100_2
[2] => 2
[3] => 1185
[4] => 0
)

Array
(
[0] => A
[1] => 100_3
[2] => 3
[3] => 1186
[4] => 0
)

Array
(
[0] => A
[1] => 101_2
[2] => 2
[3] => 1188
[4] => 0
)

Array
(
[0] => A
[1] => 302
[2] => 0
[3] => 1161
[4] => 0
)

What I'd like to do is to select all the values which have _1,2,3 only, and remove the _1,2,3 so the desired result would be:

Array
(
[0] => A
[1] => 100
[2] => 1
[3] => 1184
[4] => 0
)

Array
(
[0] => A
[1] => 100
[2] => 2
[3] => 1185
[4] => 0
)

Array
(
[0] => A
[1] => 100
[2] => 3
[3] => 1186
[4] => 0
)

Array
(
[0] => A
[1] => 101
[2] => 2
[3] => 1188
[4] => 0
)

Array
(
[0] => A
[1] => 302
[2] => 0
[3] => 1161
[4] => 0
)

Notice only values which contain _1,2,3 have been changed. Many thanks for your help it's much appreciated.

The code I have so far is:

foreach($data as $line) {
    if(substr($line,0,1)=="A") {
    if(!$first) {
        $parts = explode(chr(9), $line);            
        list($num1, $num2) = explode('_', $parts[1]); //this code needs to come first
        $parts[2] = isset($num2) ? $num2 : $parts[2]; //it replaces key[2] with _* (1,2,3)

//echo "<pre>"; print_r($parts); echo "</pre>";

   //the code to remove _* needs to go here.

    $pos = strpos($parts[1], '_');  // this was all it needed a simple two liner
    if($pos !== false) $parts[1] = substr($parts[1], 0, $pos);

有一个简单的解决方案我可以放在一个函数中来解决以下问题： p>

我有多个数组如下： p>

  Array 
（
 [0] =＆gt; A 
 [1] =＆gt; 100_1 
 [2  ] =＆gt; 1 
 [3] =＆gt; 1184 
 [4] =＆gt; 0 
）
 
Array 
（
 [0] =＆gt; A 
 [1] =＆gt;  100_2 
 [2] =＆gt; 2 
 [3] =＆gt; 1185 
 [4] =＆gt; 0 
）
 
Array 
（
 [0] =＆gt; A 
 [  1] =＆gt; 100_3 
 [2] =＆gt; 3 
 [3] =＆gt; 1186 
 [4] =＆gt; 0 
）
 
Array 
（
 [0] =＆gt;  ; A 
 [1] =＆gt; 101_2 
 [2] =＆gt; 2 
 [3] =＆gt; 1188 
 [4] =＆gt; 0 
）
 
Array 
（
  [0] =＆gt; A 
 [1] =＆gt; 302 
 [2] =＆gt; 0 
 [3] =＆gt; 1161 
 [4] =＆gt; 0 
）
   code>  pre> 
 
 我想要做的是选择只有_1,2,3的所有值，
并删除_1,2,3以便得到所需的结果 ： p> 
 
 
  Array 
（
 [0] =＆gt; A 
 [1] =＆gt; 100 
 [2] =＆gt; 1 
 [3  ] =＆gt; 1184 
 [4] =＆gt; 0 
）
 
Array 
（
 [0] =＆gt; A 
 [1] =＆gt; 100 
 [2] =＆gt;  2 
 [3] =＆gt; 1185 
 [4] =＆gt; 0 
）
 
Array 
（
 [0] =＆gt; A 
 [1] =＆gt; 100 
 [  2] =＆gt;  3 
 [3] =＆gt;  1186 
 [4] =＆gt;  0 
）
 
Array 
（
 [0] =＆gt; A 
 [1] =＆gt; 101 
 [2] =＆gt; 2 
 [3] =＆gt; 1188 
 [  4] =＆gt; 0 
）
 
Array 
（
 [0] =＆gt; A 
 [1] =＆gt; 302 
 [2] =＆gt; 0 
 [3] =＆gt;  ; 1161 
 [4] =＆gt; 0 
）
  code>  pre> 
 
 请注意，只有包含_1,2,3的值已被更改。
非常感谢您的支持 非常感谢。 p> 
 
 
到目前为止我的代码是： p> 
 
 
  foreach（$ data as $ line）{
 if  （substr（$ line，0,1）==“A”）{
 if（！$ first）{
 $ parts = explode（chr（9），$ line）;  
 list（$ num1，$ num2）= explode（'_'，$ parts [1]）;  //这个代码需要先来
 $ parts [2] = isset（$ num2）？  $ num2：$ parts [2];  //它用_ *（1,2,3）
 
 // echo“＆lt; pre＆gt;”替换键[2]; 的print_r（$部分）;  echo“＆lt; / pre＆gt;”; 
 
 //删除_ *的代码需要转到此处。
 
 $ pos = strpos（$ parts [1]，'_'）;  //这就是它需要一个简单的两个衬里
 if（$ pos！== false）$ parts [1] = substr（$ parts [1]，0，$ pos）; 
  code>   pre> 
  div>

答

Assuming the _1 etc. always happens in array[1]

foreach($array as $row) {
    $pos = strpos($row[1], '_');
    if($pos !== false) $row[1] = substr($row[1], 0, $pos);
}

答

you can use the following:

function formatArray($array)
{
    if(is_array($array))
    {
        foreach($array as $key=>$value)
        {
            $array[$key] = str_replace('_1', '', $value);
            $array[$key] = str_replace('_2', '', $value);
            $array[$key] = str_replace('_3', '', $value);
        }
        return $array;
    }
    return false;

}

Call this function with every array as parameter or you can assign the complete array to and parent array and then add one more foreach to loop through it.

答

Just write a function which uses preg_replace to alter your data:

<?php
$test_data = array("A", "100_1", "0", "1184", "0");

function removeValuesWithUnderScore(array $arr){
    //Loop over array
    foreach($arr as $key => $value){
        $arr[$key] = preg_replace('/_[1-3]/', '', $value);
    }

    //Return altered array
    return $arr;
}

$test_data = removeValuesWithUnderScore($test_data);

答

Try this :

$array = array("A", "100_1", 0, 1184, 0);
$array = array_map(
    function($str) {
        return preg_replace('/\_[\d]+/', '', $str);
    },
    $array
);

print_r($array)

Edit : If OP needs only _1, _2 and _3 to be removed :

$array = array("A", "100_3", 0, 1184, 0);
$array = array_map(
    function($str) {
        return preg_replace('/\_[1|2|3]/', '', $str);
    },
    $array
);

print_r($array)

答

presuming you want any value with _xxx appended to be replaced:

foreach($array as &$element){
    $element = strstr($element, '_', true)?:$element;
}

php数组在多个数组中选择一个键值并更改它们

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