正則表達式幫助操縱字符串

Question

我正在認真地努力讓我的頭繞過正則表達式。

我有一個SRING與「iPhone：52.973053，-0.021447」

我想結腸成逗號分隔這麼兩個不同的字符串後兩個數字提取。

任何人都可以幫助我嗎？乾杯

Answer 1

不使用正則表達式，使用explode()和stripos() :)一個解決方案：

$string = "iPhone: 52.973053,-0.021447"; 
$coordinates = explode(',', $string); 
// $coordinates[0] = "iPhone: 52.973053" 
// $coordinates[1] = "-0.021447" 

$coordinates[0] = trim(substr($coordinates[0], stripos($coordinates[0], ':') +1)); 

假設該字符串總是包含一個冒號。

或者，如果冒號前的標識符僅包含字符（不是數字），你可以這樣做也是這個：

$string = "iPhone: 52.973053,-0.021447"; 
$string = trim($string, "a..zA..Z: "); 
//$string = "52.973053,-0.021447" 

$coordinates = explode(',', $string); 

Answer 2

嘗試：

preg_match_all('/\w+:\s*(-?\d+\.\d+),(-?\d+\.\d+)/', 
    "iPhone: 52.973053,-0.021447 FOO: -1.0,-1.0", 
    $matches, PREG_SET_ORDER); 
print_r($matches); 

主要生產：

Array 
(
    [0] => Array 
     (
      [0] => iPhone: 52.973053,-0.021447 
      [1] => 52.973053 
      [2] => -0.021447 
     ) 

    [1] => Array 
     (
      [0] => FOO: -1.0,-1.0 
      [1] => -1.0 
      [2] => -1.0 
     ) 

) 

或者只是：

preg_match('/\w+:\s*(-?\d+\.\d+),(-?\d+\.\d+)/', 
    "iPhone: 52.973053,-0.021447", 
    $match); 
print_r($match); 

如果字符串只包含一個座標。

一個小的解釋：

\w+  # match a word character: [a-zA-Z_0-9] and repeat it one or more times 
:  # match the character ':' 
\s*  # match a whitespace character: [ \t\n\x0B\f\r] and repeat it zero or more times 
(  # start capture group 1 
    -?  # match the character '-' and match it once or none at all 
    \d+ # match a digit: [0-9] and repeat it one or more times 
    \.  # match the character '.' 
    \d+ # match a digit: [0-9] and repeat it one or more times 
)  # end capture group 1 
,  # match the character ',' 
(  # start capture group 2 
    -?  # match the character '-' and match it once or none at all 
    \d+ # match a digit: [0-9] and repeat it one or more times 
    \.  # match the character '.' 
    \d+ # match a digit: [0-9] and repeat it one or more times 
)  # end capture group 2 

Answer 3

嘗試：

$string = "iPhone: 52.973053,-0.021447"; 

preg_match_all("/-?\d+\.\d+/", $string, $result); 
print_r($result); 

Answer 4

我喜歡@ Felix的非正則表達式的解決方案，我認爲他的問題的解決方案比使用正則表達式更清晰可讀。

不要忘記，如果原始字符串格式被更改，您可以使用常量/變量來更改通過逗號或冒號分割。

喜歡的東西

define('COORDINATE_SEPARATOR',','); 
define('DEVICE_AND_COORDINATES_SEPARATOR',':'); 

Answer 5

$str="iPhone: 52.973053,-0.021447"; 
$s = array_filter(preg_split("/[a-zA-Z:,]/",$str)); 
print_r($s); 

Answer 6

甚至更​​簡單的解決方案是用一個更簡單的正則表達式，例如使用使preg_split（）

$str = 'iPhone: 52.973053,-0.021447'; 
$parts = preg_split('/[ ,]/', $str); 
print_r($parts); 

，這將給你

Array 
(
    [0] => iPhone: 
    [1] => 52.973053 
    [2] => -0.021447 
)