在不损坏数组的情况下查找并替换 Phrases/text 数组中的多行 Phrases/text

Question

假设我有一个数组：

$myarray = (
 [0] => 'Johnny likes to go to school',
 [1] => 'but he only likes to go on Saturday',
 [2] => 'because Saturdays are the best days', 
 [3] => 'unless you of course include Sundays',
 [4] => 'which are also pretty good days too.',
 [5] => 'Sometimes Johnny likes picking Strawberrys',
 [6] => 'with his mother in the fields',
 [7] => 'but sometimes he likes picking blueberries'
);

保持此数组的结构不变，我希望能够替换其中的短语，即使它们溢出到下一个或上一个字符串。我也不希望标点符号或大小写影响它。

示例：

要查找的字符串： "周日也不错"

替换为： “星期一也很棒”

替换后：

$myarray = (
     [0] => 'Johnny likes to go to school',
     [1] => 'but he only likes to go on Saturday',
     [2] => 'because Saturdays are the best days', 
     [3] => 'unless you of course include Mondays', 
     [4] => 'which are also pretty great days too.',
     [5] => 'Sometimes Johnny likes picking Strawberrys',
     [6] => 'with his mother in the fields',
     [7] => 'but sometimes he likes picking blueberries'
    );

想知道是否有理想的方法来做到这一点。我最初的想法是，我会将数组转换为字符串，去除标点符号和空格，计算字符数并根据字符数替换短语。但是，它变得相当复杂，但这是一个复杂的问题

Answer 1

这是正则表达式的作业。

我用的方法是implode数组加上一些glue（即'&'）。然后我通过在查找字符串中的每个字符之间插入对 '&' 的零或一检查来生成一个正则表达式。

我使用正则表达式将我们要查找的字符串替换为替换字符串。然后我使用与上面相同的分隔符 exploded 将字符串返回到数组中 ('&')

$myarray = [
    0 => 'Johnny likes to go to school',
    1 => 'but he only likes to go on Saturday',
    2 => 'because Saturdays are the best days',
    3 => 'unless you of course include Mondays',
    4 => 'which are also pretty great days too.',
    5 => 'Sometimes Johnny likes picking Strawberrys',
    6 => 'with his mother in the fields',
    7 => 'but sometimes he likes picking blueberries'
];

// preg_quote this because we're looking for the string, not for a pattern it might contain
$findstring = preg_quote("Sundays which are also pretty good");
// htmlentities this in case it contains a string of characters which happen to be an html entity
$replacestring = htmlentities("Mondays which are also pretty great");

// Combine array into one string
// We use htmlentitles to escape the ampersand, so we can use it as a sentence delimeter
$mystring = implode("&", array_map('htmlentities', $myarray));

// Turns $findString into:
// S\&?u\&?n\&?d\&?a\&?y\&?s\&? \&?w\&?h\&?i\&?c\&?h\&? \&?a\&?r\&?e\&?
// \&?a\&?l\&?s\&?o\&? \&?p\&?r\&?e\&?t\&?t\&?y\&? \&?g\&?o\&?o\&?d
$regexstring = implode("\&?", str_split($findstring));

// Johnny likes to go to school&but he only likes to go on Saturday&because Saturdays are the
// best days&unless you of course include Mondays&which are also pretty great days
// too.&Sometimes Johnny likes picking Strawberrys&with his mother in the fields&but sometimes
// he likes picking blueberries
$finalstring = preg_replace("/$regexstring/", $replacestring, $mystring);

// Break string back up into array, and return any html entities which might have existed
// at the beginning.
$replacedarray = array_map('html_entity_decode', explode("&", $finalstring));

var_dump($replacedarray);

在不损坏数组的情况下查找并替换 Phrases/text 数组中的多行 Phrases/text

Find and Replace Multi-Row Phrases/text Within PHP Arrays without damaging the array

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