在php中搜索字符串，搜索字段包含空格 [英] Searching string in php, search field contains white space

问题描述

这是我的代码

<?php $a = strtolower($criteria);if (strpos($a, 'fits models from: 11/2000') !== false) {echo '适合 2000 年的模型，';?>

我的空白有问题.如果我只使用 'fits models from' 或者如果我使用 '11/2000'，它会找到字符串，而不是两者的结合.我需要把它们组合起来，否则没用.

我不能做这样的事情:

<?php $a = strtolower($criteria);if (strpos($a, 'fits models from') !== false)如果 (strpos($a, '11/2000') !== false) {echo '适合 2000 年的模型，';?>

因为我想用它来将关键因素与文本(汽车模型)与其余部分分开并输出该信息.如果 $criteria 说 'fits model from 11/2000, but only fits model until 06/2002' 那么它将输出'fits model from 2000', 'fits model until 2000', 'fits model from 2002', 'fits model until2002'.

解决方案

识别未知字符:

1. 找到字符串编码(在您的情况下可能是 UTF-8)
2. 用字符提取一个短子串
3. 将其拆分为字节并以十六进制显示
4. 查看编码表，找出用于编码它的字节是什么字符

带有字符串的示例:"a:\xe2\x80\x85b" 看起来像 a: b 但空间较小.

$str = "a:\xe2\x80\x85b";//我写了 \xe2\x80\x85 只是为了设置 $str 并显示一个工作代码，//但在这里我不知道这些字节的值是什么preg_match('~:(.*?)b~us', $str, $m);//: 和 b 之间的最短子串echo implode(' ', array_map(function ($b) { return dechex(ord($b)); }, str_split($m[1])));//e2 80 85

我得到3个字节e2 80 85，然后我搜索它是否代表unicode table 并且我发现:U+2005 e2 80 85 四个每个 EM 空间

结论:未知字符是一个 FOUR-PER-EM SPACE(Unicode 点:U+2005)并且需要将 3 个字节 e2 80 85 编码在UTF-8.所以我可以用双引号字符串写"\xe2\x80\x85".

This is my code

<div style="display:inline-block; ">    
<?php $a = strtolower($criteria); if (strpos($a, 'fits models from: 11/2000') !== false) { 
     echo 'Fits models from 2000,'; } ?> </div>

I have a problem with the white space. It finds the string if I use only 'fits models from' or if I use '11/2000', but not the two combined. I need them combined or else it's usless.

EDIT: I can't do something like this:

<?php $a = strtolower($criteria); 
if (strpos($a, 'fits models from')  !== false)  
if (strpos($a, '11/2000') !== false) { 
    echo 'Fits models from 2000,'; } ?> </div> 

because I want to use it to seperate key factors from a text, which is the car model, from the rest and output that information. If $criteria says 'fits model from 11/2000, but only fits model until 06/2002' then it will output 'fits model from 2000', 'fits model until 2000', 'fits model from 2002', 'fits model until 2002'.

解决方案

To identity an unknown character:

1. find the string encoding (probably UTF-8 in your case)
2. extract a short substring with the character
3. split it into bytes and display them in hexadecimal
4. looking at the encoding table, find what character it is with the byte(s) used to encode it

example with the string: "a:\xe2\x80\x85b" that looks like a: b but with a smaller space.

$str = "a:\xe2\x80\x85b"; // I wrote \xe2\x80\x85 only to set $str and to show a working code,
                          // but here I don't know what are the values of these bytes  

preg_match('~:(.*?)b~us', $str, $m); // shortest substring between : and b

echo implode(' ', array_map(function ($b) { return dechex(ord($b)); }, str_split($m[1])));

// e2 80 85

I obtain the 3 bytes e2 80 85, then I search if it represents one or several characters in the unicode table and I find: U+2005   e2 80 85 FOUR-PER-EM SPACE

Conclusion: the unknown character is a FOUR-PER-EM SPACE (unicode point: U+2005) and needs the 3 bytes e2 80 85 to be encoded in UTF-8. So I can write it "\xe2\x80\x85" in a double quoted string.

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