限制替换次数的str_replace

<?php

$a = array(
    ‘陆金所‘,
    ‘有利网‘,
    ‘安捷财富‘
);

$b = array(
    ‘<a href="http://www.baidu1.com">陆金所</a>‘,
    ‘<a href="http://www.baidu2.com">有利网</a>‘,
    ‘<a href="http://www.baidu3.com">安捷财富</a>‘
);

$str = ‘有投友报料说，央视点名提示股市风险，并指出陆金所、有利网、安捷财富P2P网贷更安全。安捷财富是何方大神可以在安全上与陆金所齐名。‘;

echo str_replace_limit($a, $b, $str, 1);

// 限制替换次数的函数
function str_replace_limit($search, $replace, $subject, $limit=-1) {
    if (is_array($search)) {
        foreach ($search as $k=>$v) {
            $search[$k] = ‘`‘ . preg_quote($search[$k],‘`‘) . ‘`‘;
        }
    } else {
        $search = ‘`‘ . preg_quote($search,‘`‘) . ‘`‘;
    }
    return preg_replace($search, $replace, $subject, $limit);
}

?>