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Add defaults() function

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This commit is contained in:
Hypolite Petovan 2018-01-01 14:50:47 -05:00
parent a86ffd878d
commit 49eda1e154
1 changed files with 45 additions and 0 deletions
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45
boot.php
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@ -572,6 +572,51 @@ function x($s, $k = null)
}
}
/**
* Return the provided variable value if it exists and is truthy or the provided
* default value instead.
*
* Works with initialized variables and potentially uninitialized array keys
*
* Usages:
* - defaults($var, $default)
* - defaults($array, 'key', $default)
*
* @brief Returns a defaut value if the provided variable or array key is falsy
* @see x()
* @return mixed
*/
function defaults() {
$args = func_get_args();
if (count($args) < 2) {
throw new BadFunctionCallException('defaults() requires at least 2 parameters');
}
if (count($args) > 3) {
throw new BadFunctionCallException('defaults() cannot use more than 3 parameters');
}
if (count($args) === 3 && !is_array($args[0])) {
throw new BadFunctionCallException('defaults($arr, $key, $def) requires an array as first parameter');
}
if (count($args) === 3 && is_null($args[1])) {
throw new BadFunctionCallException('defaults($arr, $key, $def) $key is null');
}
$default = array_pop($args);
if (call_user_func_array('x', $args)) {
if (count($args) === 1) {
$return = $args[0];
} else {
$return = $args[0][$args[1]];
}
} else {
$return = $default;
}
return $return;
}
/**
* @brief Returns the baseurl.
*