cvs: /phpdoc/language types.sgml

cslawi Sun Nov 14 19:50:49 1999 EDT Modified files: /phpdoc/language types.sgml Log: Note PHP4's syntax for putting multidim arrays in strings. Index: phpdoc/language/types.sgml diff -u phpdoc/language/types.sgml:1.6 phpdoc/language/types.sgml:1.7 --- phpdoc/language/types.sgml:1.6 Sun Nov 14 18:43:00 1999 +++ phpdoc/language/types.sgml Sun Nov 14 19:50:48 1999 @@ -234,31 +234,43 @@ </programlisting> </informalexample></para> - <note> - <para> - It is not possible to reference multidimensional arrays directly - within strings. For instance, the following will not have the - desired result: - <informalexample> - <programlisting role="php"> + <para> + In PHP3 it is not possible to reference multidimensional arrays + directly within strings. For instance, the following will not + have the desired result: + <informalexample> + <programlisting role="php"> $a[3]['bar'] = 'Bob'; echo "This won't work: $a[3][bar]"; - </programlisting> - </informalexample> + </programlisting> + </informalexample> - In PHP3, the above will output - <computeroutput>This won't work: Array[bar]</computeroutput>. The string - concatenation operator, however, can be used to overcome this: - - <informalexample> - <programlisting role="php"> + In PHP3, the above will output + <computeroutput>This won't work: Array[bar]</computeroutput>. The string + concatenation operator, however, can be used to overcome this: + + <informalexample> + <programlisting role="php"> $a[3]['bar'] = 'Bob'; echo "This will work: " . $a[3][bar]; - </programlisting> - </informalexample> + </programlisting> + </informalexample> - </para> - </note> + </para> + + <para> + In PHP4, however, the whole problem may be circumvented by + enclosing the array reference (inside the string) in curly + braces: + <informalexample> + <programlisting role="php"> +$a[3]['bar'] = 'Bob'; +echo "This will work: {$a[3][bar]}"; + </programlisting> + </informalexample> + + </para> + <para> You can "fill up" multi-dimensional arrays in many ways,