1、判断文件或文件夹是否可写
/**
* 判断文件或文件夹是否可写
* @param string $file 文件或目录
* @return bool
*/
function is_really_writable($file)
{
if (DIRECTORY_SEPARATOR === '/') {
return is_writable($file);
}
if (is_dir($file)) {
$file = rtrim($file, '/') . '/' . md5(mt_rand());
if (($fp = @fopen($file, 'ab')) === false) {
return false;
}
fclose($fp);
@chmod($file, 0777);
@unlink($file);
return true;
} elseif (!is_file($file) or ($fp = @fopen($file, 'ab')) === false) {
return false;
}
fclose($fp);
return true;
}
2、用户名首字母设置为头像
/**
* 首字母头像
* @param $text
* @return string
*/
function letter_avatar($text)
{
$total = unpack('L', hash('adler32', $text, true))[1];
$hue = $total % 360;
list($r, $g, $b) = hsv2rgb($hue / 360, 0.3, 0.9);
$bg = "rgb({$r},{$g},{$b})";
$color = "#ffffff";
$first = mb_strtoupper(mb_substr($text, 0, 1));
$src = base64_encode('<svg xmlns="http://www.w3.org/2000/svg" version="1.1" height="100" width="100"><rect fill="' . $bg . '" x="0" y="0" width="100" height="100"></rect><text x="50" y="50" font-size="50" text-copy="fast" fill="' . $color . '" text-anchor="middle" text-rights="admin" alignment-baseline="central">' . $first . '</text></svg>');
$value = 'data:image/svg+xml;base64,' . $src;
return $value;
}
3、日期格式化(评论用)
function format_date($date) {
$str = '';
$timer = $date;
$diff = $_SERVER['REQUEST_TIME'] - $timer;
$day = floor($diff / 86400);
$free = $diff % 86400;
if($day > 0) {
return $day."天前";
}else{
if($free>0){
$hour = floor($free / 3600);
$free = $free % 3600;
if($hour > 0){
if($hour == 24){
return '昨天 '.date('d',$date);
}else{
return $hour."小时前";
}
}else{
if($free>0){
$min = floor($free / 60);
$free = $free % 60;
if($min>0){
return $min."分钟前";
}else{
if($free>0){
return $free."秒前";
}else{
return '刚刚';
}
}
}else{
return '刚刚';
}
}
}else{
return '刚刚';
}
}
}
4、根据生日获取年龄
function getBirthday($birthday){
$age = strtotime($birthday);
if($age === false){
return false;
}
list($y1,$m1,$d1) = explode("-",date("Y-m-d",$age));
$now = strtotime("now");
list($y2,$m2,$d2) = explode("-",date("Y-m-d",$now));
$age = $y2 - $y1;
if((int)($m2.$d2) < (int)($m1.$d1))
$age -= 1;
return $age;
}
5、将字节转换为可读文本
function format_bytes($size, $delimiter = '')
{
$units = array('B', 'KB', 'MB', 'GB', 'TB', 'PB');
for ($i = 0; $size >= 1024 && $i < 6; $i++) {
$size /= 1024;
}
return round($size, 2) . $delimiter . $units[$i];
}
本文不定期持续更新中,欢迎大佬给予宝贵的建议
文内有用到fastadmin一些方法,参考https://www.fastadmin.net/
来了来了