arrays - 数组占位符

Question

我有一个数组，其中 PLACEHOLDER 是我稍后在代码中得到的变量 $value 的占位符：

$names = array(
    "<a href='http://skyler.com' title='PLACEHOLDER'>Skyler</a>",
    "<a href='http://jesse.com' title='PLACEHOLDER'>Jesse</a>",
    "<a href='http://walter.com' title='PLACEHOLDER'>Walter</a>",
    "<a href='http://skyler.com' title='PLACEHOLDER'>Skyler</a>",
    "<a href='http://hank.com' title='PLACEHOLDER'>Hank</a>",
    "<a href='http://marie.com' title='PLACEHOLDER'>Marie</a>",
    "<a href='http://walter.com' title='PLACEHOLDER'>Walter</a>",
    "<a href='http://walter.com' title='PLACEHOLDER'>Walter</a>",
    "<a href='http://jesse.com' title='PLACEHOLDER'>Jesse</a>",
    );

为了检查数组中相等值的频率，我用array_count_values.

$count = array_count_values($names);

foreach ($count as $key => $value) {
    echo $value . ' – ' . $key . '<br />';
}

所以我得到这样的东西：

3 – <a href='http:/walter.com' title='PLACEHOLDER'>Walter</a>
2 – <a href='http://jesse.com' title='PLACEHOLDER'>Jesse</a>
2 – <a href='http://skyler.com' title='PLACEHOLDER'>Skyler</a>
1 – <a href='http://hank.com' title='PLACEHOLDER'>Hank</a>  
1 – <a href='http://marie.com' title='PLACEHOLDER'>Marie</a>

现在我将 PLACEHOLDER 替换为 $value，因此我将数字作为链接的标题标签。

Answer 1

你在问什么，我不明白，你想用 $value 替换 PLACEHOLD 然后这样做

$names = array(
"<a href='http://skyler.com' title='".$PLACEHOLDER."'>Skyler</a>",
"<a href='http://jesse.com' title='".$PLACEHOLDER."'>Jesse</a>"
);

Answer 2

用于str_replace将 PLACEHOLDER 替换为$value

foreach ($count as $key => $value) {
    $key = str_replace('PLACEHOLDER', $value, $key); //<--replace PLACEHOLDER here
    echo $value . ' – ' . $key . '<br />';
}

Answer 3

foreach ($count as $key => $value) {
    echo $value . ' – ' . str_replace('PLACEHOLDER', $value, $key) . '<br />';
}

Answer 4

正确的代码是：

foreach ($count as $key => $value) {
    echo str_replace('PLACEHOLDER', $value, $key); //this will replace placeholder with number of tags
    echo '<br />';
}