php append to file
I like php’s file_put_contents function, which can write a string to a file with single line of code: file_put_contents(“file.txt”,”content”); Few languages have such powerful function. In C language, you need […]
php
Warning: mysqli_stmt_bind_param(): Number of variables doesn’t match number of parameters in prepared statement
How to bind to variable number of variables in mysqli_stmt_bind_param() in one statement? mysqli_stmt_bind_param() itself can accept variable parameters. The prototype of mysqli_stmt_bind_param is: mysqli_stmt_bind_param ( mysqli_stmt $stmt , string […]
How to fix the mysql problems after upgrading php 5 to php 7?
If you ever upgrade php5 to php7 for your server/vps/shared hosting, you probably encounter the following errors: Fatal error: Uncaught Error: Call to undefined function mysql_connect() Fatal error: Uncaught Error: […]
How to convert bin to integer in PHP?
I have a project in which I need to convert a byte into an integer: <?php $a=md5(“hello”,true); echo $a[15]*1.0/255.0; The second parameter of md5 is set to true in order […]
JSON in javascript, python, and php
I often got confused about JSON and JSON string. JSON is the code you write in your javascript script to represent an object, so the code is called JavaScript Object […]
How to uncompress gzip-encoded content in php?
If you use php curl to scrape web page, the retrieved content may be in compressed format,i.e., the Content-Encoding http response header may have the value “gzip”. How to uncompress […]
default http headers generated by php curl
We know that we can customize http headers for php curl using CURLOPT_HTTPHEADER. But if we do not add additional headers, what http headers does curl send by default? In […]
How to log curl request?
I encountered a strange problem of php curl. I use curl to fetch a remote web page as follows: $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, “https://myprogrammingnotes.com”); curl_setopt($curl, CURLOPT_HEADER,1); curl_setopt($curl, CURLOPT_FRESH_CONNECT,1); curl_setopt($curl, […]
Does php curl issue an http GET request or an POST request?
php curl is often used to fetch remote content. Sure you can use file_get_content to fetch remote web pages. But curl has more options to choose. We know that http […]
How to display errors on php web pages?
To debug .php web pages, you want to print something on the browser’s windows when opening the web pages. You can use the php echo or print function to display […]