Question

我有以下代码

$allArray =  array("AAAAA","ABBB","BBBB","BDDFD","TTTT","ZZZZ");

当每个字符串的第一个字符发生变化时，我需要做什么，然后我必须对其进行一些字体更改。

foreach($allArray as $data){

     $first = substr($data,0,1);

     // HOW TO COMPARE FIRST WITH OTHER VALUES & IF A IS CHANGED FROM B,T or Z THEN I HAVE TO MAKE THAT FIRST CHARACTER COLOR CHANGE & INCREASE THE SIZE OF FONT.

}

我需要输出如下

AAAAA ABBBB

BBBB BDDFD

TTT

ZZZZ

所以所有的alphabates都在不同的组中。

该字符串的第一个字符，颜色和颜色不同。不同的大小。

所以

BBBB BDDFD

这里来自BBBB - ＆gt;第一个B将采用不同的颜色和不同大小

Answer 1

您可以使用数组键通过$your_array[$current_key-1]：

来查看

$allArray =  array("AAAAA","ABBB","BBBB","BDDFD","TTTT","ZZZZ");
sort($allArray);
$color = rand_color(); // initial
$break = ' ';

foreach($allArray as $k => $value) {

    if($k == 0) { // initial
        echo "<span style='color: $color; font-size: 35px;'>$value[0]</span>" . substr($value, 1);
        continue;
    }

    if($allArray[$k-1][0] != $value[0]) {
        $color = rand_color(); // generate new row
        $break = '<br/>';
        $value = "<span style='color: $color; font-size: 35px;'>$value[0]</span>" . substr($value, 1);
    } else {
        $break = ' '; // continuation

    }

    echo "$break $value";
}

function rand_color() { // this is just for presentational purposes
    return sprintf('#%06X', mt_rand(0, 0xFFFFFF));
}

Sample Output

另一种方法是使用hashmap，然后在收集后显示它：

$allArray =  array("AAAAA","ABBB","BBBB","BDDFD","TTTT","ZZZZ");

$group = array();
foreach ($allArray as $value) {
    $group[$value[0]][] = $value;
}

foreach($group as $values) {
    $values = implode(' ', $values);
    $color = rand_color();
    $values = "<span style='color: $color; font-size: 35px;'>$values[0]</span>" . substr($values, 1) . '<br/>';
    echo $values;
}

function rand_color() {
    return sprintf('#%06X', mt_rand(0, 0xFFFFFF));
}

Sample Output

Answer 2

foreach($allArray as $data => $value){

     $first = substr($value,0,1);
}

$data只有数组的索引而不是值。值为$value，因此将与$value进行比较。

Answer 3

嗯试试这个

foreach($allArray as $data => $value){ 
     $first = substr($value,0,1); 
     $newString = "<span color='red'>$firts</span>".substr($value,1,strlen($value)); 
}

如何比较字符串的第一个字符与其他PHP

3 个答案: