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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:
$model->relation()->exists()
generic solution working on...
JQuery: 'Uncaught TypeError: Illegal invocation' at ajax request - several elements
...instead of its value, which is actually what I wanted to do (in fact in my php code I need that value as a foreign key for querying my cities table and filter correct entries).
So, instead of:
var data = {
'mode': 'filter_city',
'id_A': e[e.selectedIndex]
};
it should be:
var da...
Any recommendations for a CSS minifier? [closed]
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I like Minify. In PHP and works with CSS or JavaScript.
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How to Remove Array Element and Then Re-Index Array?
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array_splice($array, 0, 1);
http://php.net/manual/en/function.array-splice.php
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Zero-pad digits in string
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There's also str_pad
<?php
$input = "Alien";
echo str_pad($input, 10); // produces "Alien "
echo str_pad($input, 10, "-=", STR_PAD_LEFT); // produces "-=-=-Alien"
echo str_pad($input, 10, "_", STR_PAD_BOTH); // produces ...
MySQL: Fastest way to count number of rows
...ach time you try to count all rows. (based on primary key's column)
Using PHP to count rows is not very smart, because you have to send data from mysql to php. Why do it when you can achieve the same on the mysql side?
If the COUNT(*) is slow, you should run EXPLAIN on the query, and check if inde...
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...
编译失败！ Error: Your build failed due to an error in the AAPT stage,...
...n
[java] INFO: BUILD 1 FINISHED
aia包属性有问题，导致的原因未知，待探索。。。
目前最好的办法就是重新建立一个项目，组件和代码拷贝过来。
PHP DOMDocument loadHTML not encoding UTF-8 correctly
...loadHTML('<?xml encoding="utf-8" ?>' . $content); fixed it for me in PHP7 (so it is still an issue) - this is a really annoying problem, because I defined utf8 in the HTML document (with <meta charset="UTF-8" />) but that has no effect, it seems to need the <?xml part, which is totall...
How to unit test an object with database queries
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I've been using PHP's PDO as my lowest level access to the database, over which I extracted an interface. Then I built an application aware database layer on top of that. This is the layer that holds all the raw SQL queries and other infor...