introudcion php

print "vamsikrishna";	sting in double quotes with semi colon
print or echo	it will print the string in the double quotes in display
echo and print are more or less the same. They are both used to output data to the screen.	The echo statement can be used with or without parentheses: echo or echo().
semicolon ends a statement  or before a statement of next line	vamsikrishnakrishnavamsi
	vamsikrishna  krishnavamsi
	space is used for if we require space
<?php
echo "vamsikrishna";	vamsikrishnakrishnavamsi
echo "krishnavamsi";
?>
space created
<?php
echo "vamsikrishna";	vamsikrishna  krishnavamsi
echo "  krishnavamsi";
?>
to print in next line
<?php
echo "vamsikrishna<br>";
echo "  krishnavamsi";
?>
single quotes vs double quotes	use single quotes outside, double quotes inside
single quotes
<?php
echo 'vamsikrishna<br>';
echo 'krishnavamsi';
?>
echo "<input type="text" value="value" >";	if u use double quotes , it showung error
use escape character inside of html
echo "<input type=\"text\" value=\"username\"> ";
or
echo '<input type="text" value="value" >';	outside double quotes and inside single quotes,it good in differentiation
embededding html inside php
programm: declaredd html outside the php
<?php
?>
<input type='text' value='sameeer'>
change the html using php
<?php
$x= 'vamsi';	declaration of variable
?>
<input type="text" value="<?php echo $x ?>">	it will print the input box with variable value inside

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print