Roeland questions

• Easy way to prevent default action when using "onclick" of a checkbox? [duplicate]
• a more simple way to code in php "if ( $x == $a[1] || $x == $a[2] || $x == $a[3] ....)
• End my urls with trailing slash (/) or not? And how do I go about it doing this with codeigniter
• Algorithm that creates "teams" based on a numeric skill value
• Short hand to do something like: if($variable == 1 || $variable == "whatever" || $variable == '492') .
• Security concerns with using Composer Install in production environment
• Create a notification popup animated in a specific way?
• merge two arrays, while maintaining the numeric keys
• move existing web app into a native phone app using a browser wrapper
• Database Structure Advice Needed

Roeland answers