Add main slides

apachecon/s_api4.php3

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+<?require "header.inc";?>
+<h1>PHP Symbol Tables</h1>
+<ul>
+<li> Hash Tables
+<li> 'active_symbol_table' - current
+<li> 'symbol_table' - main (global)
+<li> _php3_hash_exist() to check if a var exists
+<li> _php3_hash_find() to check the type of a var
+<li> Arrays in PHP use the same hash functions
+</ul>
+
+<h1>Setting variables in the symbol table</h1>
+<ul>
+<li>SET_VAR_STRING(name,value)
+<li>SET_VAR_DOUBLE(name,value)
+<li>SET_VAR_LONG(name,value)
+</ul>
+<h3>value arg must be emalloc'ed - no static memory!</h3>
+<?require "footer.inc";?>