How to replace numbers with php regular

How to implement regular replacement of numbers in php: First create a PHP sample file; then use the regular expression "preg_match_all('/(＼d )＼.(＼d )/is', $total, $arr );" Just replace the numbers in the string.

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php regular expression to extract numbers from a string Example

Today I was developing a collector and needed to get numbers from a string. Later I thought of using regular expressions to get them.

Use regular expressions

The code is as follows

$str = ereg_replace(‘[^0-9]‘,”,$str);和
$str = preg_replace( ‘/[^＼d]/ ‘, ‘ ‘,$str);

Example

The code is as follows

function findNum($str=''){
$str=trim($str);
if(empty($str)){return '';}
$reg='/(＼d{3}(＼.＼d+)?)/is';//匹配数字的正则表达式
preg_match_all($reg,$str,$result);
if(is_array($result)&&!empty($result)&&!empty($result[1])&&!empty($result[1][0])){
return $result[1][0];
}
return '';
}

If it is a decimal point, our above method is obviously not Correct, we can modify it

The code is as follows

 $regexp = '/(＼d+)＼.(＼d+)/is';
$total = "42.234 EUR 53.218 AUD CAD97.164 311.151 MYR 125.042 NZD GBP84.270 SGD60.227 USD134.400";
preg_match_all('/(＼d+)＼.(＼d+)/is', $total, $arr);
var_export($arr);
 ?>

The result is what we want. If you don’t believe me, go and try it.

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