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php笔记php课堂笔记

1天前CN2资讯

将文件转字符串

//将文件转字符串
$content = file_get_contents('./tmp.xlsx');

根据某几个键值相同就去重

$list = $newData = [];
//word，type，style3个相同的去重
foreach ($data as $key => $value) {
if ($key != 0) {
$newData[$value[0]] = $value[1] . ',' . $value[2] . ',' . $value[3];
$list[$value[0]] = $value;
}
}
//获取去掉重复数据的数组
$uniqueArr = array_unique($newData);
//重复数组
$repeatArr = array_diff_assoc($newData, $uniqueArr);
//删除重复
foreach ($repeatArr as $rekey => $revalue) {
unset($list[$rekey]);
}
sort($list);

IdArr

删除空值（去重（获取某值变成一维数组））
$idArr = array_filter(array_unique(array_column($list, 'id')));

php 生成文件txt到指定目录

file_put_contents("c:/zll.txt","内容");

php.ini设置上传临时文件路径

upload_tmp_dir = D:\owen\lswj\

基于php实现base64格式的图片数据如何转成图片

// $base_img是获取到前端传递的值
$base_img = str_replace('data:image/jpg;base64,', '', $code);
// 设置文件路径和命名文件名称
$path = "D:/Uploads/Bar/2019-12-11/";
$output_file = time().rand(100,999).'.jpg';
$path = $path.$output_file;
// 创建将数据流文件写入我们创建的文件内容中
file_put_contents($path, base64_decode($base_img));
// 输出文件
print_r($output_file);

php自定义返回json数据函数

public function result($errno, $message, $data = '') {
ob_clean();//清空输出缓冲区
exit(json_encode(array(
'errno' => $errno,
'message' => $message,
'data' => $data,
)));
}
return $this->result('10014', 'redis connect fail', '');

字符串

//存在某字符，替换字符
if(strpos($compareOdds,"\")!==false){
$compareOdds=str_replace("\",'',$compareOdds);
}//字符串是否存在某字符
strstr($data['tags'], ',')
//字符转数组

$tagsArr = explode(", ", $data['tags']);

/**
* 实现姓名和手机号星号*替换
* @return string
*/
if (!function_exists('mbSubstrReplace')) {
function mbSubstrReplace($string, $replacement, $start, $length = null, $encoding = null)
{
if (extension_loaded('mbstring') === true) {
$string_length = (is_null($encoding) === true) ? mb_strlen($string) : mb_strlen($string, $encoding);

if ($start < 0) {
$start = max(0, $string_length + $start);
} else if ($start > $string_length) {
$start = $string_length;
}

if ($length < 0) {
$length = max(0, $string_length - $start + $length);
} else if ((is_null($length) === true) || ($length > $string_length)) {
$length = $string_length;
}

if (($start + $length) > $string_length) {
$length = $string_length - $start;
}

if (is_null($encoding) === true) {
return mb_substr($string, 0, $start) . $replacement . mb_substr($string, $start + $length, $string_length - $start - $length);
}

return mb_substr($string, 0, $start, $encoding) . $replacement . mb_substr($string, $start + $length, $string_length - $start - $length, $encoding);
}

return (is_null($length) === true) ? substr_replace($string, $replacement, $start) : substr_replace($string, $replacement, $start, $length);
}
}

/**
* 实现姓名*替换
* 马克思：马*思
* 马思：*思
* 马列主义：马*义
* @return string
*/
if (!function_exists('getMaskName')) {
function getMaskName($name)
{
if (mb_strlen($name) > 2) {
return mbSubstrReplace($name, '*', 1, -1);
} else {
return mbSubstrReplace($name, '*', 0, -1);
}
}
}
/**
* 实现手机号星号*替换
* 12345679878：123****9878
* @return string
*/
if (!function_exists('getMaskMobile')) {
function getMaskMobile($mobile)
{
return substr($tel, 0, 3)."****".substr($tel, 7);
}
}

PHP 对象数组和一般的数组的相互转化

/* * 把数组转化成任何你想要的对象类型的数组： */

if (!function_exists('arrayToObject')) {
function arrayToObject($array) {
$aboutVideoArr = array();
if (is_array($array)) {
foreach ($array as $value) {
$video = new Video();
foreach ($value as $key => $val) {
$video->$key = $val;
}
array_push($aboutVideoArr, $video);
}
} else {
$video = $array;
}
return $aboutVideoArr;
}
}

// 把对象转化成普通的数组：
if (!function_exists('objectToarray')) {
function objectToarray($object) {
if (is_object($object)) {
foreach ($object as $key => $value) {
$array[$key] = $value;
}
}
else {
$array = $object;
}
return $array;
}
}

/**
* 生成一批随机数随机数之合为一个值
* @param $count 随机数个数
* @param $sum 随机数总和
* @param $mix 最小随机数
* @param $max 最大随机数
*/
public function getRand($count, $sum, $mix, $max)
{
ini_set('memory_limit', "1024M");
$i = 1;
while ($i <= $count) {

$tmp[] = mt_rand($mix, $max);
$i++;
}
$k = array_sum($tmp) ? ($sum / array_sum($tmp)) : 0;
$res = [];
foreach ($tmp as $v) {
$res[] = (int)($v * $k);
}
$assoc = $sum - array_sum($res);
$last = array_pop($res);
$res[] = $last + $assoc;
while (max($res) > $max) {
$tmax = max($res);
$key = array_search($tmax, $res);
if ($key !== false) {
$res[$key] = mt_rand($mix, $max);
$k = array_search(min($res), $res);
$res[$k] = $tmax - $res[$key] + min($res);
}
}
return $res;
}

php 数组进行分页

$pagesize = input('limit/d', 20);
$page = input('page/d', 1);
$createTimeArr = getBetweenTimeArr($createTimeStart, date('Y-m-d'));
$count = count($createTimeArr);
$start = ($page - 1) * $pagesize;
$end = $start + $pagesize;
$end = $end > $count ? $count : $end;
$newList = [];

for ($i = $start; $i < $end; $i++) {
$newList[] = $createTimeArr[$i];
}

return $newList;