替换条件字符串-PHP [英] replace string on condition - php

问题描述

我在这里面临一个问题，尝试在某种情况下用另一个字符串替换。
检查示例：

i am facing an issue here , trying to replace string with another under a condition. check the example :

$data = '
tony is playing with toys.
tony is playing with "those toys that are not his" ';

所以我想用卡代替玩具 >。但只有那些不在疑问句中的（ ）。

so i want to replace toys with cards . but only which is NOT in ques (").

我知道如何替换所有属于玩具的单词

i know how to replace all words that are toys .

$data = str_replace("toys", "cards",$data);

，但是我不知道如何添加一个条件，该条件指定仅替换不在（ ）。

but i don't know how to add a condition which specifies to replace only the one's which are not in the (").

有人可以帮忙吗？

推荐答案

这是一种简单的方法。使用引号分隔/分解字符串。结果数组中的第一个（ 0 -index）元素和每个偶数索引均为无引号的文本；奇数在引号内。示例：

Here's one simple way to do it. Split/explode your string using quotation marks. The first (0-index) element and each even-numbered index in the resulting array is unquoted text; the odd numbers are inside quotes. Example:

Test "testing 123" Test etc.
^0    ^1          ^2

然后，仅将偶数数组元素中的魔术字（玩具）替换为替换（卡）即可。

Then, just replace the magic words (toys) with the replacement (cards) in only the even-numbered array elements.

示例代码：

function replace_not_quoted($needle, $replace, $haystack) {
    $arydata = explode('"', $haystack);

    $count = count($arydata);
    for($s = 0; $s < $count; $s+=2) {
        $arydata[$s] = preg_replace('~'.preg_quote($needle, '~').'~', $replace, $arydata[$s]);
    }
    return implode($arydata, '"');
}

$data = 'tony is playing with toys.
tony is playing with toys... "those toys that are not his" but they are "nice toys," those toys';

echo replace_not_quoted('toys', 'cards', $data);

因此，此处的示例数据为：

So, here, the sample data is:

tony is playing with toys.
tony is playing with toys... "those toys that are not his" but they are "nice toys," those toys

该算法按预期工作并产生：

The algorithm works as expected and produces:

tony is playing with cards.
tony is playing with cards... "those toys that are not his" but they are "nice toys," those cards

这篇关于替换条件字符串-PHP的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！