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Laravel Check If Related Model Exists
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In php 7.2+ you can't use count on the relation object, so there's no one-fits-all method for all relations. Use query method instead as @tremby provided below:
$model->relation()->exists()
generic solution working on...
App Inventor 2 上传文件到服务器的方案全总结 - App Inventor 2 中文网 - ...
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使用Web客户端的POST文件的方法,参考代码如下:
php服务端代码参考:<?php
/* FileName: PicXfer.php
* Simple PHP script to save image file.
*/
echo "We're in the XFER Program...";//phpinfo();
$picDir = "./test/";
$fileName = $_REQUEST['pic'];...
Any recommendations for a CSS minifier? [closed]
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I like Minify. In PHP and works with CSS or JavaScript.
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php中三个等于号是什么意思?=== - PHP - 清泛IT论坛,有思想、有深度
1、=:赋值,在逻辑运算时也有效;
2、==:等于运算,但是不比较值的类型;
3、===:完全等于运算,不仅比较值,而且还比较值的类型,只有两者一致才为真。
程序员之网络安全系列(二):如何安全保存用户密码及哈希算法 - 更多技术 ...
...来我才想起可以用穷举法,最多就999次不就打开了?那么问题来了,你的密码箱还安全吗?
彩虹表
除了穷举法外,由于之前的密码泄露,那么攻击者们,手上都有大量的彩虹表,比如”I love you”,生日等等,这个表保存了这些...
实战低成本服务器搭建千万级数据采集系统 - 更多技术 - 清泛网 - 专注C/C++...
...评估下来硬件资源不是瓶颈,看下获取数据的接口有什么问题?
1、通过各大微博的搜索api。就比如新浪微博API针对一个服务器IP的请求次数,普通权限限制是一个小时1w次,最高权限合作授权一个小时4w次。使用应用时还需...
SHA1 vs md5 vs SHA256: which to use for a PHP login?
I'm making a php login, and I'm trying to decide whether to use SHA1 or Md5, or SHA256 which I read about in another stackoverflow article. Are any of them more secure than others? For SHA1/256, do I still use a salt?
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Laravel Eloquent: Ordering results of all()
...sorting the collection with sortBy() happens inside the Laravel Engine (in PHP), while the orderBy() is done in the database. Surely the database is going to be quicker in almost all conceivable situations, and as your dataset increases so will the disparity in performance. I'd love to hear other pe...
【解决】phpMyAdmin 导入数据文件最大限制 - 更多技术 - 清泛网 - 专注C/C++及内核技术
【解决】phpMyAdmin 导入数据文件最大限制phpmyadmin_post_max_size etc php 7 0 apache2 php ini 默认配置2M,即通过http post上传的文件最大2M,修改配置搞定: PHP上传文件大小限制upload_max_filesize = 200M http post发送文件大小限 /etc/php/7.0/apache2/p...
