<?php
$a1 = [
[ 'course_id' => 100, 'name' => 'Организация работы в летних оздоровительных лагерях' ],
[ 'course_id' => 50, 'name' => 'Педагогическое образование: учитель технологии' ],
[ 'course_id' => 150, 'name' => 'Специалист в сфере закупок' ]
];
$a2 = [
[ 'course_id' => 150 ],
[ 'course_id' => 50 ],
[ 'course_id' => 100 ]
];
$a1 = array_column($a1, null, 'course_id');
return $a1[$v];
}, array_column($a2, 'course_id'));
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