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PHP的函数前加上“@”的作用 - PHP - 清泛IT论坛，有思想、有深度
@是PHP提供的错误信息屏蔽的专用符号。
比如在一个函数前使用@
@mysql_query 不会出现Warning，
而原来mysql_query 在遇到错误时会在页面上访提示Warning。
php安装gd库扩展（无需源码安装） - 更多技术 - 清泛网 - 专注C/C++及内核技术
php安装gd库扩展（无需源码安装）php_gd_installgd是php图片处理库，网上各种源码安装，非常复杂，其实很简单，无需源码编译。apt install php-gd重启apache生效：systemctl restart apache2gd是php图片处理库，网上各种源码安装，非常复杂，其...
Performance - Date.now() vs Date.getTime()
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Is this because Date(optional).getTime(); has to allocate space to get a new Date object before getting the current time?
– Charlie G
Sep 20 '12 at 17:07
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What's the fastest way to read a text file line-by-line?
...n a 511 KB file), probably due to how String.Split is implemented. It also allocates an array for all the lines increasing the memory required compared to your solution.
using (var streamReader = File.OpenText(fileName)) {
var lines = streamReader.ReadToEnd().Split("\r\n".ToCharArray(), StringSpl...
How to exclude file only from root folder in Git
...ignore file to exclude some files being added, but I have several config.php files in source tree and I need to exclude only one, located in the root while other keep under revision control.
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JSON: why are forward slashes escaped?
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PHP escapes forward slashes by default which is probably why this appears so commonly. I'm not sure why, but possibly because embedding the string "</script>" inside a <script> tag is considered unsafe.
This func...
The character encoding of the HTML document was not declared
...ur HTML tags and doctype go away. You need to include those in your insert.php file:
<!DOCTYPE html PUBLIC"-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" ...
Real differences between “java -server” and “java -client”?
...visible immediate difference in older versions of Java would be the memory allocated to a -client as opposed to a -server application. For instance, on my Linux system, I get:
$ java -XX:+PrintFlagsFinal -version 2>&1 | grep -i -E 'heapsize|permsize|version'
uintx AdaptivePermSizeWeight ...
How to repair a serialized string which has been corrupted by an incorrect byte count length?
...en ( $data2 )) ? strlen ( $data1 ) : strlen ( $data2 );
echo $data1 . PHP_EOL;
echo $data2 . PHP_EOL;
for($i = 0; $i < $max; $i ++) {
if (@$data1 {$i} !== @$data2 {$i}) {
echo "Diffrence ", @$data1 {$i}, " != ", @$data2 {$i}, PHP_EOL;
echo "\t-> ...
How do you debug PHP scripts? [closed]
How do you debug PHP scripts?
30 Answers
30
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