Basic functions : PHP

Some of the basic functions and data manipulation in PHP are given below:
 

$str_1 = " DeveloperDK Blogspot ";

• echo "DK_".$str_1."_DK";                // --> DK _ DeveloperDK Blogspot _ DK
• echo "DK_".trim($str_1)."_DK";       // --> DK_ DeveloperDK Blogspot _DK
• echo strtolower($str_1);                    // --> developerdk blogspot
• echo strtoupper($str_1);                    // --> DEVELOPERDK BLOGSPOT 

                       

$str_2 = "developerdk Blogspot";

• echo ucwords($str_2);                       // --> Developerdk Blogspot

                       

$str_3 = "deVeloperdk BloGspot";

• echo ucwords(strtolower($str_3));                 // --> Developerdk Blogspot
• echo substr($str_3,0,5);                                 // --> deVel
• echo substr($str_3,0,-4);                               // --> deVeloperdk BloGspot
• echo substr($str_3,4);                                    // --> loperdk BloGspot
• echo substr($str_3,-4);                                  // --> spot

                       

$str_4 = "Developer";

$str_5 = 11;

• echo is_string($str_4);                        // --> o/p : 1
• echo is_string($str_5);                        // --> no o/p                    

$str_6 ="100.00";

• echo intval($str_6);                            // --> 100

                       

$str_7 = 2.3;

• echo is_float($str_7);                         // --> o/p : 1