Can I subscript an array variable inside a double quoted PHP string?

Question

I have an array of custom hooks I'd like to schedule, built along these lines:

public function __construct(WPSM_Logger $injected_logger = null) {
    $this->cron_hooks[WPSM_CRONHOOK_SENDQUEUE] = array ("frequency" => 60);
}

Then, in the constructur for my Scheduler class, I would like to loop through $this->cronhooks and schedule each hook in that array. I normally prefer straight and simple variable expansion within double quoted strings, like what I do with $name below, but I can't seem to figure out how to do this with an array and subscript.

foreach ($this->cron_hooks as $name => $options) {
    $freq = $options["frequency"];
    echo "Hook '$name' will run every $freq seconds.";  
}

I would like to do away with the intermediary $freq = $options["frequency"]; line, and have something like this in the echo line:

foreach ($this->cron_hooks as $name => $options) {
    $freq = $options["frequency"];
    echo "Hook '$name' will run every $options['frequency]seconds.";    
}

However, I simply can't get that to work. Is there something special I'm missing, or do I really have to drag an extra variable along to my party?

Alex · Accepted Answer · 2012-01-15 11:54:39Z

11

have you tried this?

foreach ($this->cron_hooks as $name => $options) {
    echo "Hook '$name' will run every ${$options['frequency']} seconds.";    
}

answered Jan 15, 2012 at 11:54

Alex

7,70825 gold badges87 silver badges153 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

ofrommel Over a year ago

That's ${options['frequency']}, right?

Dexygen · Accepted Answer · 2019-07-16 13:01:45Z

8

Try:

${options['frequency']}

See: https://www.php.net/manual/en/language.types.string.php#language.types.string.parsing.complex

edited Jul 16, 2019 at 13:01

answered Jan 15, 2012 at 11:55

Dexygen

12.6k13 gold badges87 silver badges154 bronze badges

Collectives™ on Stack Overflow

Can I subscript an array variable inside a double quoted PHP string?

2 Answers 2

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related