Question

我在php中有这个数组

$name = array("page18.jpg","page16.jpg","page17.jpg","page19.jpg",);

我想剥去字符串中的所有字母和点只保留像

这样的数字

$name = array("18","16","17","19");

我如何实现这一点可以指导我如何用PHP语言

Answer 1

试试这个，使用 preg_replace

$name = array("page18.jpg","page16.jpg","page17.jpg","page19.jpg",);
foreach($name as $val)
{
    $new_name[] = preg_replace('/\D/', '', $val);
}

<强> DEMO

Answer 2

您可以使用字符串替换功能（str_replace()）而不使用正则表达式来执行此操作：

<?php
$name = array("page18.jpg","page16.jpg","page17.jpg","page19.jpg",);
$myArra = array();
foreach ($name as $key => $value) {
  $var = str_replace("page", "", $value);
  $var = str_replace(".jpg", "", $var);
  $myArra[] = $var; // store all value without text and .jpg
}
print_r($myArra);
?>

<强>结果：

Array
(
    [0] => 18
    [1] => 16
    [2] => 17
    [3] => 19
)

或者，如果您想使用Regex，则可以使用/\d+/模式：

<?php
$name = array("page18.jpg","page16.jpg","page17.jpg","page19.jpg",);
$myArra = array();
foreach ($name as $key => $value) {
  preg_match_all('/\d+/', $value, $matches);
  $myArra[] = $matches[0][0];  // store all value without text and .jpg
}
echo "<pre>";
print_r($myArra);
?>

<强>结果：

Array
(
    [0] => 18
    [1] => 16
    [2] => 17
    [3] => 19
)

Answer 3

除了使用str_replace()和preg_replace()之外，您可以使用array_map()和filter_val()，如下所示：

$name = array("page18.jpg","page16.jpg","page17.jpg","page19.jpg",);
$name = array_map(function($fv) {
    return filter_var($fv, FILTER_SANITIZE_NUMBER_INT);
    }, $name);

print_r($name);

输出

阵列

（

[0] =＆gt; 18

[1] =＆gt; 16

[2] =＆gt; 17

[3] =＆gt; 19

）

Answer 4

<?php 

$name = array ("page18.jpg","page16.jpg","page17.jpg","page19.jpg");

$myarray =array(); 

foreach($name as $key =>$value){

$page_replace= str_replace("page", "",$value); //replace page as a blank

$jpg_replace= str_replace(".jpg","",$page_replace); //replace jpg to blank

$myarray[] =$jpg_replace;//stroing without jpg and page getting resulut as key value pair

}
echo "<pre>";

print_r($myarray);

?>

Answer 5

来自PHP的非常简化的原生解决方案：

" Here, I use бакло as a shortcut for the list of all cyrillic letters,
" this makes this a small self contained example for the word used in the
" problem desctiption, without having the full list in all lines.
" To get the file I actually have, run
" :%s/бакло/ЖжФфЭэЗзЧчБбАаДдВЬвьЪъЫыСсЕеёНнЮюІіКкМмИиЙйПпЛлОоРрЯяГгТтЦцШшЩщХхУу/g
syn match russianWordOk "[бакло]\+"

syn match russianWordError "[бакло][a-zA-Z0-9_]\+"hs=s+1
syn match russianWordError "[a-zA-Z0-9_]\+[бакло]"he=e-1
syn match russianWordError "[бакло][a-zA-Z0-9_]\+[бакло]"hs=s+1,he=e-1

输出：数组（[0] =＆gt; 18 [1] =＆gt; 16 [2] =＆gt; 17 [3] =＆gt; 19）

享受清新的空气;）

仅从数组中获取数字

5 个答案: