如何在php中修改数组值的空格

I have an array as follows

我有一个数组，如下所示

$fruit = array('  apple ','banana   ', ' , ',     '            cranberry ');

I want an array which contains the values without the white spaces on either sides but it can contain empty values how to do this in php.the output array should be like this

我想要一个数组，它包含的值两边都没有空格，但是它可以包含空值如何在php中实现这一点。输出数组应该是这样的。

$fruit = array('apple','banana', ',', 'cranberry');

7 个解决方案

#1

376

array_map and trim can do the job

array_map和trim可以完成这项工作

$trimmed_array=array_map('trim',$fruit);
print_r($trimmed_array);

#2

array_walk can be used with trim() to trim array

array_walk可以与trim()一起用于修饰数组

<?php
function trim_value(&$value) 
{ 
    $value = trim($value); 
}

$fruit = array('apple','banana ', ' cranberry ');
var_dump($fruit);

array_walk($fruit, 'trim_value');
var_dump($fruit);

?>

See 2nd example at http://www.php.net/manual/en/function.trim.php

参见第二个示例http://www.php.net/manual/en/function.trim.php

#3

If the array is multidimensional, this will work great:

如果阵列是多维的，这将发挥巨大的作用:

//trims empty spaces in array elements (recursively trim multidimesional arrays)
function trimData($data){
   if($data == null)
       return null;

   if(is_array($data)){
       return array_map('trimData', $data);
   }else return trim($data);
}

one sample test is like this:

一个样本测试是这样的:

$arr=[" aaa ", " b  ", "m    ", ["  .e  ", "    12 3", "9 0    0 0   "]];
print_r(trimData($arr));
//RESULT
//Array ( [0] => aaa [1] => b [2] => m [3] => Array ( [0] => .e [1] => 12 3 [2] => 9 0 0 0 ) )

#4

$fruit= array_map('trim', $fruit);

#5

I had trouble with the existing answers when using multidimensional arrays. This solution works for me.

我在使用多维数组时遇到了现有答案的问题。这个解决方案对我有效。

if (is_array($array)) {
    foreach ($array as $key => $val) {
        $array[$key] = trim($val);
    }
}

#6

function generateRandomString($length = 10) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $charactersLength = strlen($characters);
    $randomString = '';
    for ($i = 0; $i < $length; $i++) {
        $randomString .= $characters[rand(0, $charactersLength - 1)];
    }
    return $randomString;
}

function generateRandomSpaces() {
    $output = '';
    $i = rand(1, 10);
    for ($j = 0; $j <= $i; $j++) {
        $output .= " ";
    }   

    return $output;
}

// Generating an array to test
$array = [];
for ($i = 0; $i <= 1000; $i++) {
    $array[] = generateRandomSpaces() . generateRandomString(10) . generateRandomSpaces(); 
}

// ARRAY MAP
$start = microtime(true);
for ($i = 0; $i < 100000; $i++) {
    $trimmed_array=array_map('trim',$array);
}
$time = (microtime(true) - $start);
echo "Array map: " . $time . " seconds\n";

// ARRAY WALK
$start = microtime(true);
for ($i = 0; $i < 100000; $i++) {
    array_walk($array, 'trim');
}
$time = (microtime(true) - $start);
echo "Array walk    : " . $time . " seconds\n"; 

// FOREACH
$start = microtime(true);
for ($i = 0; $i < 100000; $i++) {
    foreach ($array as $index => $elem) {
        $array[$index] = trim($elem);
    }
}
$time = (microtime(true) - $start);
echo "Foreach: " . $time . " seconds\n";

// FOR
$start = microtime(true);
for ($i = 0; $i < 100000; $i++) {
    for ($j = 0; $j < count($array) - 1; $j++) { 
        $array[$j] = trim($array[$j]);
    }
}
$time = (microtime(true) - $start);
echo "For: " . $time . " seconds\n";

The output of the code above is:

以上代码输出为:

Array map: 8.6775720119476 seconds
Array walk: 10.423238992691 seconds
Foreach: 7.3502039909363 seconds
For: 9.8266389369965 seconds

阵列地图:8.6775720119476秒阵列行走:10.423238992691秒Foreach: 7.3502039909363秒For: 9.8266389369965秒

This values of course may change but I would say foreach is the best option.

这个值当然会改变，但我认为foreach是最好的选择。

#7

-1

function trimArray(&$value) 
{ 
    $value = trim($value); 
}
$pmcArray = array('php ','mysql ', ' code ');
array_walk($pmcArray, 'trimArray');

Test

测试

#1

376