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  • utf8字节

    <pre name="code" class="html">[root@wx03 0724]# perl a1.pl 
    112
    [root@wx03 0724]# perl a1.pl 
    dawe^H^H微信adda
    success
    [root@wx03 0724]# perl a1.pl 
    22微信3131 
    success
    [root@wx03 0724]# 
    
    [root@wx03 0724]# cat a1.pl 
    my $a=<STDIN>;
    my $b='微信';
    if ($a =~/$b/){print "success
    ";};
    
    
    
    [root@wx03 0724]# perl a1.pl 
    22微信3131
    [root@wx03 0724]# cat a1.pl 
    use Mojolicious::Lite;
    my $a=<STDIN>;
    my $b='微信';
    if ($a =~/$b/){print "success
    ";};
    
    此时匹配不上了:
    
    
    
    因为开启了utf8;
    
    [root@wx03 0724]# perl a1.pl 
    22微信3131
    success
    [root@wx03 0724]# cat a1.pl 
    use Mojolicious::Lite;
    use Encode;
    my $a=<STDIN>;
    my $b=encode_utf8('微信');
    if ($a =~/$b/){print "success
    ";};
    
    
    继续测试;
    [root@wx03 0724]# perl a1.pl 
    "my" variable $a masks earlier declaration in same scope at a1.pl line 4, <DATA> line 2125.
    23微信2231
    success
    
    [root@wx03 0724]# cat a1.pl 
    use Mojolicious::Lite;
    use Encode;
    my $a=<STDIN>;
    my $a=decode_utf8("$a");
    my $b='微信';
    if ($a =~/$b/){print "success
    ";};
    
    
    
    
    [root@wx03 0724]# perl a1.pl 
    "my" variable $a masks earlier declaration in same scope at a1.pl line 5, <DATA> line 2125.
    23微信2231
    $a is 23微信2231
    
    Wide character in print at a1.pl line 6, <STDIN> line 1.
    $a is 23微信2231
    
    success
    
    [root@wx03 0724]# cat a1.pl 
    use Mojolicious::Lite;
    use Encode;
    my $a=<STDIN>;
    print "$a is $a
    ";
    my $a=decode_utf8("$a");
    print "$a is $a
    ";
    my $b='微信';
    if ($a =~/$b/){print "success
    ";};
    
    
    
    /******************
    [root@wx03 0724]# perl a2.pl 
    23微信2231
    $b is 微信
    success
    
    [root@wx03 0724]# cat a2.pl 
    use Encode;
    use Mojolicious::Lite;
    my $a=<STDIN>;
    my $b=encode_utf8('微信');
    print "$b is $b
    ";
    if ($a =~/$b/){print "success
    ";};
    
    
    
    [root@wx03 0724]# perl a2.pl 
    23微信2231
    $b is 微信
    
    [root@wx03 0724]# cat a2.pl 
    use Encode;
    my $a=<STDIN>;
    my $b=encode_utf8('微信');
    print "$b is $b
    ";
    if ($a =~/$b/){print "success
    ";};
    [root@wx03 0724]# 
    


    
    
    
                                        
    
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  • 原文地址:https://www.cnblogs.com/hzcya1995/p/13350483.html
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