PHP系统函数是PHP核心提供的内置函数，用于执行常见任务，如字符串操作、数组处理、数学运算等。它们通过预定义代码块封装了特定功能，开发者可直接调用而无需重复编写代码。而 PHP 8.0以后又新增了一些实用函数，今天总结部分常见的系统函数供大家学习使用。1.fdiv()<?php// 用于浮点数除法，返回两个数的商echo ...

Long story short, i'm trying to optimize a situation where I need to iterate through an array of about 3000 items and check to see if they are in another array of up to 3000 items.Obviously, the ...

PHP array elements, with the key representing the action. When the form is submitted, this naming scheme will cause a single-element array to be created ...

I've got a bunch of $_POST values being brought over from a form. Many of these values are from checkboxes, with the form names all starting with 'field_'. These signify the columns in a chart ...