Error in codeigniter's Output.php file (system/core/Output.php)

[spicer1]

Error: Message: str_replace(): Passing null to parameter #3 ($output) of type array|string is deprecated

You need to replace at line no. 457 in system/core/Output.php

$output = str_replace(array('{elapsed_time}', '{memory_usage}'), array($elapsed, $memory), $output);

with this
$output = $output ? str_replace(array('{elapsed_time}', '{memory_usage}'), array($elapsed, $memory), $output): "";

[gxgpet]

Hi!

Can you please provide an example of a code snippet to reproduce the issue? Are you altering any other property of CI_Output? What PHP version are you using?

[otengkwame]

@gxgpet It is not easy to reproduce the error, but what I know is, it returns an empty view to the browser and I realized it is a deprecation error.

When you look at the code below I just added an if block to check if $output is equal to null and then set it to an empty string
And that fixed it.

// Parse out the elapsed time and memory usage,
// then swap the pseudo-variables with the data

$elapsed = $BM->elapsed_time('total_execution_time_start', 'total_execution_time_end');

if ($this->parse_exec_vars === true) {

	if ($output === null) {
		$output = ''; // this is how I fixed it;
	}

	$memory	= round(memory_get_usage() / 1024 / 1024, 2) . 'MB';
	$output = str_replace(['{elapsed_time}', '{memory_usage}'], [$elapsed, $memory], $output);
}