Question

我正在尝试更改子字符串的颜色，如下所示：

$str = 'abcd<efgh>lmno';

preg_match_all('/<[\S]*?>/m', $str, $matches, PREG_PATTERN_ORDER);

$replacements = $needles = [];
foreach ($matches[0] as $match) {
    $needles[]      = $match;
    $replacements[] = '<span style="color:red;">' . $match . '</span>';
}

echo str_replace($needles, $replacements, $str);

我希望得到以下结果：abcd<span style="color:red;"><efgh></span>lmno 但我得到：abcdlmno

Answer 1

尝试一下：

$str = 'abcd<efgh>lmno';

preg_match_all('/<[\S]*?>/m', $str, $matches, PREG_PATTERN_ORDER);

foreach ($matches[0] as $match) {
    $str = str_replace($match, '<span style="color:red;">' . $match . '</span>', $str);
}

echo $str;
//abcd<span style="color:red;"><efgh></span>lmnoC

为什么这部分PHP代码不起作用？

1 个答案: