Builtin or Predefined Functions in PHP

Tutorial Title: Builtin or Predefined Functions in PHP
Course: PHP
Instructor: Muhammad Samim




1.  Predefined Math Functions in PHP

• Math predefined functions make easier coding
• echo pow(2,7); //2 power of 7 will be displayed
• echo rand(1, 1000); //Random numbers between 1 and 1000
• echo sqrt(100); //Square root of 100  
• echo ceil(5.6) // Round up of 5.6
• echo floor(5.6) //Round down of 5.6
• echo round(5.6) //Round of 5.6
• For more Click Here!

2. Predefined String Functions in PHP

• $variableName = "Muhammad Samim";
• echo strlen($variableName); //Length of string inside $variableName
• echo strtoupper($variableName); //Converting to upper case of string inside $variableName
• echo strtolower($variableName); //Converting to lower case of string inside $variableName
• Fore more Click Here!

3. Predefined Array Functions in PHP

• Predefined functions for arrays
• $arrayName = [345,56,6,78,45,3543,0];
• echo max($arrayName); //Displays the maximum number in array
• echo min($arrayName); //Displays the minimum number in array
• print_r ($arrayName); //Showing complete structure of array before understanding sorting
• sort($arrayName); //Sort the array in ascending order
• For more Click Here!