打开文本文件，查找文本中有多少位数。 [英] Open a text file and find how many digits are there in the text.

问题描述

$handle = fopen("mytext.txt", "r");

echo fread($handle,filesize("mytext.txt"));
echo preg_match("/[0-9]/","",$handle);

fclose($handle);

我尝试过：



我试图使用preg_match，但我认为这不是正确的方法。

What I have tried:

I tried to use preg_match but I think this is not correct way to do it.

推荐答案

handle = fopen（ mytext.txt， r）;

echo fread（

handle = fopen("mytext.txt", "r"); echo fread(

handle，filesize（ mytext.txt））;
echo preg_match（ / [0- 9] /， ，

handle,filesize("mytext.txt")); echo preg_match("/[0-9]/","",

手柄）;

fclose（

handle); fclose(

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