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<?php $Array1 = [ [ 'username' => 'uname1', 'name' => 'fullname1', 'email' => 'uname1@email.com' ], [ 'username' => 'uname2', 'name' => 'fullname2', 'email' => 'uname2@email.com' ], [ 'username' => 'uname3', 'name' => 'fullname3', 'email' => 'uname3@email.com' ], ]; $Array2 = [ [ 'username' => 'uname1', 'name' => 'fullname1', 'email' => 'uname1@email.com' ], ]; var_export( array_uintersect( $Array2, $Array1, fn($a, $b) => $a['email'] <=> $b['email'] ) ? 'email already exists' : 'no matches' );
Output for git.master, git.master_jit
'email already exists'

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