The dollar sign$has also a special meaning in PHP; it denotes a variable. If a variable is used inside a string, it is interpolated, i.e. the value of the variable is used. To echo a variable name, we escape the$character\$. PHP string functions PHP has a large number of useful ...
There are two basic types of functions. Built-in functions and user defined ones. The built-in functions are part of the PHP language. Examples are:phpinfo,roundorabs. The user defined functions are created by application programmers to cover their needs. They are created with thefunctionkeyword...
Luckily for you, PHP brings a whole set of predefined functions that help you in interacting with strings. You can find the entire list of functions at http://php.net/manual/en/ref.strings.php, but we will only cover the ones that are used the most. Let's look at some examples:...
<?php $myString = "This is a test string."; $myString = strtoupper($myString); // Assign converted string to the orignal variable ?> The PHP string functions designed to change the case of a string are listed below with descriptions: ...
When we start a session PHP check for the presence of this cookie, if it does not exists it will be set and provide a random string in this cookie, each client will get unique string. If we want to use a session in a page we call session_start() method at the beginning of our ...
It is also available or applicable for interfaces, arrays, and functions that are callable. It is not capable of handling specific objects/objects which are like float, int, string, and Boolean type, etc. Suppose if we use PHP Type Hinting for INT data type then the execution of the progr...
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Now let us see an example if keys are string using ksort() function in PHP. Example #2 Code: Educba- ksort() in PHP <?php echo "Demonstration of ksort() with strings in PHP \n"; echo ""; $arr1 = array("Educba" => "1", "Google"...
Working with LOBs The discussion here will focus on PHP's OCI8 extension. It's also worth noting that Oracle provides the DBMS_LOB package, containing parallel procedures and functions for working with LOBs using PL/SQL. The PHP OCI8 extension registers a PHP class called "OCI-Lob" in the ...
resource opendir ( string path) string readdir ( resource dir_handle) void closedir ( resource dir_handle) Now you have mastered working with individual files, it is time to take a look at the larger file system - specifically how PHP handles directories. As you have seen so far, worki...