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<?php $arr = array(); $arr['all'][] = 'bar'; var_dump( $arr ); $arr = array( 'all' => 'foo' ); $arr['all'][] = 'bar'; var_dump( $arr ); $arr = array( 'all' => array() ); $arr['all'][] = 'bar'; var_dump( $arr ); $arr = array( 'all' => array( 'foo' ) ); $arr['all'][] = 'bar'; var_dump( $arr );
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { ["all"]=> array(1) { [0]=> string(3) "bar" } } Fatal error: Uncaught Error: [] operator not supported for strings in /in/EqpTU:8 Stack trace: #0 {main} thrown in /in/EqpTU on line 8
Process exited with code 255.

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