We need subexpressions for complex and refined output. We can refine our output by grouping the expressions. E.g. Test Case – HelloHello RegEx – Hello{2,} Result – Hello{2,} It will not match any Hello because above expression is finding 'Hell' and Read more…
Using Boundaries : Position matching is used to specify where within a string of text a match should occur. To understand the need for position matching,consider the following example: TEXT The cat scattered his food all over the room. REGEX Read more…
Matching One or More Characters To match one or more instances of a character (or set),simply append a + character. + matches one or more characters (at least one; zero would not match). Whereas a matches a, a+ matches one Read more…
Escaping : Metacharacters are characters that have special meaning within regular expressions. The period (.) is a metacharacter; it is usedto match any single character. Similarly, the left bracket ([) is a metacharacter; it is used to mark the beginning Read more…
We have added two web proxy services : 1. PHP proxy 2 CGI proxy We do not log your activity at all on our servers and cookies are auto deleted within 24 hours. Now you don't have to search for free Read more…
Sometime we want to fetch the information from a domain. In PHP file_get_contents function would work fine. We can easily get few pages without getting blocked but if we want to circumvent few security measures then we have to use CURL Read more…
1. In a switch statement 'default' case is written at the end or at the start or wherever we want inside switch? — It can be written anywhere in switch control instruction as an independent case. 2. Is the below Read more…
1. What do you mean by scope of a variable? What are the different types of scopes that a variable can have? — Scope Indicates the region over which the variable's declaration has an effect. The four kinds of Read more…
There are few tips here which will help you protect your vps against attacks: 1. Change SSH port : you can change it be logging into you server console with root privilages. Then type [crayon-5a2bb38d2b10f118484973/] and find line Read more…
In Unix, how do I kill another login session remotely? You can kill a Unix/Linux login session remotely by sending a hangup signal (SIGHUP) to the process running the login session. To do this, follow the steps below: Identify the shell you Read more…