为什么语法错误，脚本中出现意外的“回声”（T_ECHO）？ [重复]

Question

This question already has an answer here:

• PHP parse/syntax errors; and how to solve them? 17 answers

I'm using codeigniter, and in the view I'm trying to save a php array that I pass from the controller to the view, in a variable from my script.

This is my code.

        var agenda;
        for (var index=0; index<7; index++) {
            switch (index) {
                case 0:
                    agenda[index] = <?php ($agenda[0] === NULL) ? echo "" : echo $agenda[0]; ?>; 
                    break;
                case 1:
                    agenda[index] = <?php ($agenda[1] === NULL) ? echo "" : echo $agenda[1]; ?>; 
                    break;
                case 2:
                    agenda[index] = <?php ($agenda[2] === NULL) ? echo "" : echo $agenda[2]; ?>; 
                    break;
                case 3:
                    agenda[index] = <?php ($agenda[3] === NULL) ? echo "" : echo $agenda[3]; ?>; 
                    break;
                case 4:
                    agenda[index] = <?php ($agenda[4] === NULL) ? echo "" : echo $agenda[4]; ?>; 
                    break;
                case 5:
                    agenda[index] = <?php ($agenda[5] === NULL) ? echo "" : echo $agenda[5]; ?>; 
                    break;
                case 6:
                    agenda[index] = <?php ($agenda[6] === NULL)  ? echo "" : echo $agenda[6]; ?>; 
                    break;

            }
        }

I have this error:

A PHP Error was encountered
Severity: Parsing Error

Message: syntax error, unexpected 'echo' (T_ECHO)

Filename: views/home2.php

Line Number: 1159

Backtrace:

</div>

Answer 1

change the echo's to:

echo (empty($agenda[0]) ? "" : $agenda[0]);

Hope that helps,