Knowledge Base Contributions

Below is a list of the knowledge base entries that Chris Kings-Lynne has contributed to:

• How do I stop a previous url?mode=del&cust=name being repeated when the user hits their back button?
  

• How can is stop a user from pressing the submit button twice on a php/mysql data entry form?
  

• How do you set and retrieve information from a cookie using php?
  

• How do you insert a word-wrap of 80char into a string?
  

• When there is an error in PHP, the parser outputs the line number. Is there some function or variable that will output the current line number?
  

• How do you convert this perl code unpack('s', pack('s', hex($x))) to PHP
  

• Provides a server-push based chatroom?
  

• I have a reviewed collection of Links. To be able to update my review, how can I find out when a (out-of-site) url was updated?
  

• How can I call a command line executable from within PHP?
  

• How do I run a PHP script as a cron job?
  

• If you are using PHP as a standalone scripting tool under NT how can you take keyboard input ?
  

• How do you estimate the size of existing MySQL database?
  

• How do you find the current working directory? Why isn't there a 'pwd()' function?
  

• How can I redirect the user to a relevant page after executing PHP code?
  

• How can I create PNG images with GD now that it doesn't support GIF's?
  Does PHP have support for PNG image generation?
  

• How do you respond to image submit buttons?
  What variables are used to store the x and y positions from an image input button?
  

• Is there a PHP library for drawing graphs?
  Is there a PHP library for drawing charts?