Using PHP code in PHP code?

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I have the following code in PHP: 

<?php if (function_exists("insert_audio_player")) {insert_audio_player("[audio:|titles=]"} ?>

Which renders an audio player to my page in WordPress. I need to call a custom field inside this code. My custom field code is also coded in PHP:

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<?php print_custom_field('tc_filename'); ?>

Something like: 

<?php if (function_exists("insert_audio_player")) {insert_audio_player("[audio:<?php print_custom_field('tc_filename'); ?>|titles=<?php print_custom_field('tc_title'); ?>]"} ?>

How can I use or integrate the second block of code with the first?

Post Views: 3

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3 comments 

  1. <?php 
if (function_exists("insert_audio_player")) {
    insert_audio_player("[audio:".print_custom_field('tc_filename')."|titles=".print_custom_field('tc_title')."]"
} ?>

    You can make this easier to read using sprintf()

    <?php 
if (function_exists("insert_audio_player")) {
    insert_audio_player(sprintf(
        '[audio:%s|titles=%s]', 
        print_custom_field('tc_filename'), 
        print_custom_field('tc_title')
    ));
} 
?>

    Edit: based on your comment, the print_custom_field actually echo’s the field, and doesn’t return it, if there is no return function you can use, you need to use Output Buffering.

    You can use a new function, which calls the print function but returns it instead of printing it to the screen:

    function get_custom_field($field) {
    ob_start();
    print_custom_field($field);
    return ob_get_clean();
}

    And use

    <?php 
if (function_exists("insert_audio_player")) {
    insert_audio_player(sprintf(
        '[audio:%s|titles=%s]', 
        get_custom_field('tc_filename'), 
        get_custom_field('tc_title')
    ));
} 
?>

  2. Edit: As stated by the OP, the print_custom_field() function uses echo rather than return, so this answer will not work for this particular situation. See @Jacob’s answer for a better solution.

    Try this:

    <?php
    if (function_exists("insert_audio_player")) {
        insert_audio_player(
            "[audio:" . print_custom_field('tc_filename') .
            "|titles=" . print_custom_field('tc_title') . "]"
        );
    }
?>

  3. <?php if (function_exists("insert_audio_player")) {insert_audio_player("[audio:".function2()."|titles=".function3()."]"} ?>

    then :

    function function2()
{
print_custom_field('tc_filename');
}
function function3()
{
print_custom_field('tc_title');
}