How to convert Chinese symbols to English letters in php

Method: 1. Use the "str_replace()" function, the syntax format is "str_replace('Chinese symbol', 'English symbol', string)"; 2. Use regular replacement, when the character length is greater than 65280 , when it is less than 65375, just subtract 65248 from the character length.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Simple replacement of str_replace()

The difference between regular replacements is 65248

Method one: simple replacement (php code)

$val1=str_replace('，',',',$val1);
$val1=str_replace('（','(',$val1); 
$val1=str_replace('）',')',$val1);

Method two: all character replacement (regular replacement)

for (int i = 0; i < c.Length; i++)
{
if (c[i]==12288)
{
c[i]= (char)32; continue;
}
if (c[i]>65280 && c[i]<65375)
c[i]=(char)(c[i]-65248);
}

1. What is the corresponding relationship between half-width symbols and full-width symbols?

The difference is 65248

///全角空格为12288,半角空格为32
///其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248 ///

2. Replace Chinese punctuation marks with English punctuation marks

Simple replacement (php code)

$val1=str_replace('，',',',$val1);
$val1=str_replace('（','(',$val1);
$val1=str_replace('）',')',$val1);

/// 转全角的函数(SBC case) ///
///任意字符串 
/// 全角字符串 ///
///全角空格为12288,半角空格为32
///其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248 ///
 
public string ToSBC(string input)
{ //半角转全角：
    char[] c=input.ToCharArray();
      for (int i = 0; i < c.Length; i++)
    {
       if (c[i]==32)
    {
    c[i]=(char)12288; continue;
  }
   if (c[i]<127) c[i]=(char)(c[i]+65248);
   }
return new string(c);
}
 
/// /// 转半角的函数(DBC case) ///
///任意字符串
/// 半角字符串 ///
///全角空格为12288，半角空格为32
///其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248 ///
public string ToDBC(string input)
{
char[] c=input.ToCharArray();
for (int i = 0; i < c.Length; i++)
{
if (c[i]==12288)
{
c[i]= (char)32; continue;
}
if (c[i]>65280 && c[i]<65375)
c[i]=(char)(c[i]-65248);
}
return new string(c);
}

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