How to write reverse output in php: 1. Create a PHP sample file; 2. Pass "for ($i=1; $i
The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer
How to write the reverse output method in php?
1. If it is a string or an array directly, you can use strrev or array_reverse to reverse it respectively.
2. Write an algorithm yourself to reverse the string.
$str = "abcdef";
for (
$i=1;
$i<=strlen($str);
$i++)
{
echo substr($str , -$i , 1)
}php positive sequence output sample code
Implementation code:
// 正序
foreach($files as $file_num => $file) {
if(is_file($directory.$file)){
//$file = iconv("gb2312","UTF-8",$file); //或者 iconv("gb2312","UTF-8",$value);
$date = substr($file,0,9);
echo '<li class="world-cup-'.$date.'">';
echo '<a href="'.$directory.$file.'" rel="worldcup" title="巴西世界杯赛事'.$date.'">';
echo '<img src="/static/imghwm/default1.png" data-src="'.$directory.$file.'" class="lazy" alt="">';
echo '</a>';
echo '</li>';
}
}Recommended learning: "PHP Video Tutorial"
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