The command echo '
will output a single quote character ('
). In many command-line environments, echo
prints the text provided to it to the terminal. Since there is nothing after the single quote to indicate a closing quote, it will simply display the single quote as is without any errors. If executed in a shell that interprets quotes, it may lead to an error due to an unclosed quote.
type this in a file save it as something.php and then run it <?php echo '*'; ?>
In Oracle, the ECHO command is used in SQL*Plus to control the display of commands in the output. When set to ON, it will display the commands being executed; when set to OFF, it will suppress the output of the commands. For example, you can use it as follows: SET ECHO ON; SELECT * FROM employees; SET ECHO OFF; In this example, the SQL command will be shown in the output when ECHO is ON, making it easier to see what commands are being run.
1
The output would be 'shell shell' (without the quotes, of course)
use the round function. For eg: <?php $value1 = 15.55; echo round($value1, 0); // Will output 16 $value2 = 20.666666666; echo round($value2, 2); // Will output 20.67 ?>
Use the append I/O redirection operator: >> An example would be: echo "Put this at the end of the file" >> aFile Which takes the output of 'echo' and puts/appends it to the end of the file aFile.
echo will not return output when using parenthesis because echo is not a function like print. echo is a language construct. The benefit to using echo over the print function is speed, plus you can separate data types using comma's rather than periods.Example:echo 'This is a string ' , $variable , ' ending string';is the same (but faster) as:print('This is a sting' . $variable . ' ending string');
Do not echo the keystrokes, output an asterisk instead.
The echo command is used to print a statement by default to the screen. example: echo Good Morning output: Good Morning note: quotes are not used and will be displayed in the output if used other examples: echo off/on - turns echo on or off, otherwise commands are visible on the screen. Useful for bat files. @echo off - the @ hides the line it precedes so use this for the first line. echo. - displays a blank line echo text > myfile.txt - writes to target location (myfile.txt), overwiting it if it exists. echo text >> myfile.txt - appends to the target (myfile.txt)
It jumps to the line after the indicated label. For example, this batch... @ECHO OFF ECHO apple GOTO BANANA ECHO sauce :BANANA ECHO ice cream ... would generate the following output: apple ice cream
Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo Echo
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