我想从一个包含数字和字母的字符串中提取数字,比如:
"In My Cart : 11 items"
我想提取数字11。
我想从一个包含数字和字母的字符串中提取数字,比如:
"In My Cart : 11 items"
我想提取数字11。
当前回答
这个脚本首先创建一个文件,将数字写入一行,如果得到的字符不是数字,则更改到下一行。最后,它再次把这些数字整理成一个列表。
string1 = "hello my name 12 is after 198765436281094and14 and 124de"
f= open("created_file.txt","w+")
for a in string1:
if a in ['1','2','3','4','5','6','7','8','9','0']:
f.write(a)
else:
f.write("\n" +a+ "\n")
f.close()
#desired_numbers=[x for x in open("created_file.txt")]
#print(desired_numbers)
k=open("created_file.txt","r")
desired_numbers=[]
for x in k:
l=x.rstrip()
print(len(l))
if len(l)==15:
desired_numbers.append(l)
#desired_numbers=[x for x in k if len(x)==16]
print(desired_numbers)
其他回答
preg_replace('/[^0-9]/', '', $string);
这应该做得更好!
对于utf8 str:
function unicodeStrDigits($str) {
$arr = array();
$sub = '';
for ($i = 0; $i < strlen($str); $i++) {
if (is_numeric($str[$i])) {
$sub .= $str[$i];
continue;
} else {
if ($sub) {
array_push($arr, $sub);
$sub = '';
}
}
}
if ($sub) {
array_push($arr, $sub);
}
return $arr;
}
按照这一步,它将把字符串转换为数字
$value = '$0025.123';
$onlyNumeric = filter_var($value, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);
settype($onlyNumeric,"float");
$result=($onlyNumeric+100);
echo $result;
另一种说法是:
$res = preg_replace("/[^0-9.]/", "", "$15645623.095605659");
这个函数也将处理浮点数
$str = "Doughnuts, 4; doughnuts holes, 0.08; glue, 3.4";
$str = preg_replace('/[^0-9\.]/','-', $str);
$str = preg_replace('/(\-+)(\.\.+)/','-', $str);
$str = trim($str, '-');
$arr = explode('-', $str);
我们可以从它中提取int
$string = 'In My Car_Price : 50660.00';
echo intval(preg_replace('/[^0-9.]/','',$string)); # without number format output: 50660
echo number_format(intval(preg_replace('/[^0-9.]/','',$string))); # with number format output :50,660
演示:http://sandbox.onlinephpfunctions.com/code/82d58b5983e85a0022a99882c7d0de90825aa398