[英]How to get specific part of a strings from a string using php?
我有這種格式的RGBA顏色:
RGBA:1.000000,0.003922,0.003922,0.003922
如何將此字符串中的每個值分隔如下:
var alpha = 1.000000;
var red = 0.003922;
var green = 0.003922;
var blue = 0.003922;
我想在php中這樣做。
將字符串拆分為兩部分:
作為分隔符,取第二部分,然后使用,
作為分隔符再次拆分結果。 將值分配給變量。 所有這些都可以在一行中完成,如下所示:
list($alpha, $red, $green, $blue) = explode(',', explode(':', $str, 2)[1]);
輸出:
string(8) "1.000000"
string(8) "0.003922"
string(8) "0.003922"
string(8) "0.003922
代碼段應該是這樣的:
$rgba = "1.000000,0.003922,0.003922,0.003922";
$rgba = explode(',', $rgba);
list($red, $green, $blue, $alpha) = $rgba;
另一種使用正則表達式的方法是
$str = 'RGBA:1.000000,0.003922,0.003922,0.003922';
preg_match_all("/(\d+\.+\d+)/", $str, $output_array);
list($alpha, $red, $green, $blue) = $output_array[1] ;
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