Question

Php.net有这个preg_replace代码段

$string = 'The quick brown fox jumped over the lazy dog.';
$patterns = array();
$patterns[0] = '/quick/';
$patterns[1] = '/brown/';
$patterns[2] = '/fox/';
$replacements = array();
$replacements[2] = 'bear';
$replacements[1] = 'black';
$replacements[0] = 'slow';
echo preg_replace($patterns, $replacements, $string);

有没有办法在$ patterns上运行preg_match来执行类似这样的操作

如果在$ string中找到preg_match，那么preg_replace else echo no matched found found

感谢。

Answer 1

似乎您要做的只是preg_replace，它还会提醒您未发生的匹配？

以下内容适用于您：

$string = 'The quick brown fox jumped over the lazy dog.';
$patterns = array();
$patterns[0] = '/quick/';
$patterns[1] = '/brown/';
$patterns[2] = '/pig/';
$replacements = array();
$replacements[2] = 'bear';
$replacements[1] = 'black';
$replacements[0] = 'slow';

for($i=0;$i<count($patterns);$i++){
    if(preg_match($patterns[$i], $string))
        $string = preg_replace($patterns[$i], $replacements[$i], $string);
    else
        echo "FALSE: ", $patterns[$i], "\n";
}
echo "<br />", $string;

/**

Output:

FALSE: /pig/
The slow black fox jumped over the lazy dog.
*/

$string = preg_replace($patterns, $replacements, $string, -1, $count);
if(empty($count)){
    echo "No matches found";
}

Answer 2

这是你在寻找的地方吗？

    $string = 'The quick brown fox jumped over the lazy dog.';
$patterns = array();
$patterns[0] = '/quick/';
$patterns[1] = '/brown/';
$patterns[2] = '/fox/';
$replacements = array();
$replacements[2] = 'bear';
$replacements[1] = 'black';
$replacements[0] = 'slow';

foreach ($patterns as $pattern) {
  if (preg_match("/\b$pattern\b/", $string)) {
    echo preg_replace($pattern, $replacements, $string);
      }
}

如何preg_match与模式是一个数组（PHP）

2 个答案: