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如何删除最后一个破折号后的字符串(但在某些文本或没有特殊格式文本时跳过破折号)?

regex php

kibus90 · 技术社区 · 6 年前

我有密码:

<?php $stringx = get_the_title();
echo preg_replace('/-[^-]*$/', '', $stringx); ?>

这个很好,但我想让它更精确一点。。。

我的弦乐是:

Production worker - Eindhoven, Netherlands
Production worker - fish - Eindnhoven, Netherlands
Production worker - fish
Porduction worker - fish - Bunschoten-Spakenburg, Netherlands

最后一次破折号后总是有一条线。。。。

Production worker
Production worker - fish
Production worker
Porduction worker - fish - Bunschoten

所以我接错了线。。。。

但我想得到:

Production worker
Production worker - fish
Production worker - fish
Porduction worker - fish

如果:

字符串包含:

[…]破折号[…]和[a-z],[空格]a-z

最后冲刺后切 ]

其他:

最后一个破折号在一些文本之间,例如单词 [然后在第二次冲刺后切下]

- (sometext) a-z,[space]A-Z

我希望是克里尔。。。我试着做匹配正则表达式,但我不能处理它。我没有得到regex并将其与HTML混合。

3 回复 | 直到 6 年前

Toto 6 年前

$tests = [
    'Production worker - Eindhoven, Netherlands',
    'Production worker - fish - Eindnhoven, Netherlands',
    'Production worker - fish',
    'Porduction worker - fish - Bunschoten-Spakenburg, Netherlands ',
];

foreach ($tests as $test) {
    $res = preg_replace('/^.+\K-\h+[A-Z].*$/', '', $test);
    echo $res,"\n";
}

说明:

^           : beginning of line
    .+      : 1 or more any character but newline, greedy
    \K      : forget all we have seen untill this positin
    -       : a dash
    \h+     : 1 or more horizontal spaces
    [A-Z]   : an uppercase
    .*      : 0 or more any character but newline
$           : end of line

Production worker 
Production worker - fish 
Production worker - fish
Porduction worker - fish

Jeff 6 年前

正如我所说,我认为你不能在一行regex中做到这一点(@Toto证明了我在这里是错的……)。所以我写了一个函数来满足你的需要。只测试给定的输入值。

<?php
function reduceItem($item) {
    $pieces = explode(" - ", $item);

    // check if last piece fits the pattern "bar, foo"
    $last = $pieces[count($pieces)-1];
                     // this regex can use simplification or refinement
    if(preg_match('/[a-zA-Z]*, [a-zA-Z]*/', $last, $matches)) {
        // if so, cut the last piece out of the array
        array_splice($pieces, count($pieces)-1);
    }
    // put the string back together
    return implode(" - ", $pieces);
}

// USAGE
// your test data
$list = ["Production worker - Eindhoven, Netherlands",
    "Production worker - fish - Eindnhoven, Netherlands",
    "Production worker - fish",
    "Porduction worker - fish - Bunschoten-Spakenburg, Netherlands"];

foreach($list as $item) {
    $newItem = reduceItem($item);
    echo "<br>$newItem";
}

// Output:
// Production worker
// Production worker - fish
// Production worker - fish
// Porduction worker - fish

或者使用变量:

<?php $stringx = get_the_title();
echo reduceItem($stringx); ?>

Inazo 6 年前

<?php

$stringx = get_the_title();


$exploded = explode('-',$stringx);

$i=0;
$to_return = '';
if( count($exploded) > 1 ){

        while( $i < (count($exploded) - 1) ){

                $to_return .= $exploded[$i].' - ';
                $i++;
        }

        $to_return = rtrim( $to_return,' - ');
}
else
        $to_return = $stringx;

echo $to_return;


?>