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1.1 misho 1: --TEST--
2: Directly modifying a REFERENCED array when foreach'ing over it.
3: --FILE--
4: <?php
5:
6: define('MAX_LOOPS',5);
7:
8: function withRefValue($elements, $transform) {
9: echo "\n---( Array with $elements element(s): )---\n";
10: //Build array:
11: for ($i=0; $i<$elements; $i++) {
12: $a[] = "v.$i";
13: }
14: $counter=0;
15:
16: $ref = &$a;
17:
18: echo "--> State of referenced array before loop:\n";
19: var_dump($a);
20:
21: echo "--> Do loop:\n";
22: foreach ($a as $k=>$v) {
23: echo " iteration $counter: \$k=$k; \$v=$v\n";
24: eval($transform);
25: $counter++;
26: if ($counter>MAX_LOOPS) {
27: echo " ** Stuck in a loop! **\n";
28: break;
29: }
30: }
31:
32: echo "--> State of array after loop:\n";
33: var_dump($a);
34: }
35:
36:
37: echo "\nPopping elements off end of a referenced array";
38: $transform = 'array_pop($a);';
39: withRefValue(1, $transform);
40: withRefValue(2, $transform);
41: withRefValue(3, $transform);
42: withRefValue(4, $transform);
43:
44: echo "\n\n\nShift elements off start of a referenced array";
45: $transform = 'array_shift($a);';
46: withRefValue(1, $transform);
47: withRefValue(2, $transform);
48: withRefValue(3, $transform);
49: withRefValue(4, $transform);
50:
51: echo "\n\n\nRemove current element of a referenced array";
52: $transform = 'unset($a[$k]);';
53: withRefValue(1, $transform);
54: withRefValue(2, $transform);
55: withRefValue(3, $transform);
56: withRefValue(4, $transform);
57:
58: echo "\n\n\nAdding elements to the end of a referenced array";
59: $transform = 'array_push($a, "new.$counter");';
60: withRefValue(1, $transform);
61: withRefValue(2, $transform);
62: withRefValue(3, $transform);
63: withRefValue(4, $transform);
64:
65: echo "\n\n\nAdding elements to the start of a referenced array";
66: $transform = 'array_unshift($a, "new.$counter");';
67: withRefValue(1, $transform);
68: withRefValue(2, $transform);
69: withRefValue(3, $transform);
70: withRefValue(4, $transform);
71:
72: ?>
73: --EXPECTF--
74: Popping elements off end of a referenced array
75: ---( Array with 1 element(s): )---
76: --> State of referenced array before loop:
77: array(1) {
78: [0]=>
79: string(3) "v.0"
80: }
81: --> Do loop:
82: iteration 0: $k=0; $v=v.0
83: --> State of array after loop:
84: array(0) {
85: }
86:
87: ---( Array with 2 element(s): )---
88: --> State of referenced array before loop:
89: array(2) {
90: [0]=>
91: string(3) "v.0"
92: [1]=>
93: string(3) "v.1"
94: }
95: --> Do loop:
96: iteration 0: $k=0; $v=v.0
97: iteration 1: $k=0; $v=v.0
98: --> State of array after loop:
99: array(0) {
100: }
101:
102: ---( Array with 3 element(s): )---
103: --> State of referenced array before loop:
104: array(3) {
105: [0]=>
106: string(3) "v.0"
107: [1]=>
108: string(3) "v.1"
109: [2]=>
110: string(3) "v.2"
111: }
112: --> Do loop:
113: iteration 0: $k=0; $v=v.0
114: iteration 1: $k=1; $v=v.1
115: --> State of array after loop:
116: array(1) {
117: [0]=>
118: string(3) "v.0"
119: }
120:
121: ---( Array with 4 element(s): )---
122: --> State of referenced array before loop:
123: array(4) {
124: [0]=>
125: string(3) "v.0"
126: [1]=>
127: string(3) "v.1"
128: [2]=>
129: string(3) "v.2"
130: [3]=>
131: string(3) "v.3"
132: }
133: --> Do loop:
134: iteration 0: $k=0; $v=v.0
135: iteration 1: $k=1; $v=v.1
136: iteration 2: $k=0; $v=v.0
137: iteration 3: $k=0; $v=v.0
138: --> State of array after loop:
139: array(0) {
140: }
141:
142:
143:
144: Shift elements off start of a referenced array
145: ---( Array with 1 element(s): )---
146: --> State of referenced array before loop:
147: array(1) {
148: [0]=>
149: string(3) "v.0"
150: }
151: --> Do loop:
152: iteration 0: $k=0; $v=v.0
153: --> State of array after loop:
154: array(0) {
155: }
156:
157: ---( Array with 2 element(s): )---
158: --> State of referenced array before loop:
159: array(2) {
160: [0]=>
161: string(3) "v.0"
162: [1]=>
163: string(3) "v.1"
164: }
165: --> Do loop:
166: iteration 0: $k=0; $v=v.0
167: iteration 1: $k=0; $v=v.1
168: --> State of array after loop:
169: array(0) {
170: }
171:
172: ---( Array with 3 element(s): )---
173: --> State of referenced array before loop:
174: array(3) {
175: [0]=>
176: string(3) "v.0"
177: [1]=>
178: string(3) "v.1"
179: [2]=>
180: string(3) "v.2"
181: }
182: --> Do loop:
183: iteration 0: $k=0; $v=v.0
184: iteration 1: $k=0; $v=v.1
185: iteration 2: $k=0; $v=v.2
186: --> State of array after loop:
187: array(0) {
188: }
189:
190: ---( Array with 4 element(s): )---
191: --> State of referenced array before loop:
192: array(4) {
193: [0]=>
194: string(3) "v.0"
195: [1]=>
196: string(3) "v.1"
197: [2]=>
198: string(3) "v.2"
199: [3]=>
200: string(3) "v.3"
201: }
202: --> Do loop:
203: iteration 0: $k=0; $v=v.0
204: iteration 1: $k=0; $v=v.1
205: iteration 2: $k=0; $v=v.2
206: iteration 3: $k=0; $v=v.3
207: --> State of array after loop:
208: array(0) {
209: }
210:
211:
212:
213: Remove current element of a referenced array
214: ---( Array with 1 element(s): )---
215: --> State of referenced array before loop:
216: array(1) {
217: [0]=>
218: string(3) "v.0"
219: }
220: --> Do loop:
221: iteration 0: $k=0; $v=v.0
222: --> State of array after loop:
223: array(0) {
224: }
225:
226: ---( Array with 2 element(s): )---
227: --> State of referenced array before loop:
228: array(2) {
229: [0]=>
230: string(3) "v.0"
231: [1]=>
232: string(3) "v.1"
233: }
234: --> Do loop:
235: iteration 0: $k=0; $v=v.0
236: iteration 1: $k=1; $v=v.1
237: --> State of array after loop:
238: array(0) {
239: }
240:
241: ---( Array with 3 element(s): )---
242: --> State of referenced array before loop:
243: array(3) {
244: [0]=>
245: string(3) "v.0"
246: [1]=>
247: string(3) "v.1"
248: [2]=>
249: string(3) "v.2"
250: }
251: --> Do loop:
252: iteration 0: $k=0; $v=v.0
253: iteration 1: $k=1; $v=v.1
254: iteration 2: $k=2; $v=v.2
255: --> State of array after loop:
256: array(0) {
257: }
258:
259: ---( Array with 4 element(s): )---
260: --> State of referenced array before loop:
261: array(4) {
262: [0]=>
263: string(3) "v.0"
264: [1]=>
265: string(3) "v.1"
266: [2]=>
267: string(3) "v.2"
268: [3]=>
269: string(3) "v.3"
270: }
271: --> Do loop:
272: iteration 0: $k=0; $v=v.0
273: iteration 1: $k=1; $v=v.1
274: iteration 2: $k=2; $v=v.2
275: iteration 3: $k=3; $v=v.3
276: --> State of array after loop:
277: array(0) {
278: }
279:
280:
281:
282: Adding elements to the end of a referenced array
283: ---( Array with 1 element(s): )---
284: --> State of referenced array before loop:
285: array(1) {
286: [0]=>
287: string(3) "v.0"
288: }
289: --> Do loop:
290: iteration 0: $k=0; $v=v.0
291: --> State of array after loop:
292: array(2) {
293: [0]=>
294: string(3) "v.0"
295: [1]=>
296: string(5) "new.0"
297: }
298:
299: ---( Array with 2 element(s): )---
300: --> State of referenced array before loop:
301: array(2) {
302: [0]=>
303: string(3) "v.0"
304: [1]=>
305: string(3) "v.1"
306: }
307: --> Do loop:
308: iteration 0: $k=0; $v=v.0
309: iteration 1: $k=1; $v=v.1
310: iteration 2: $k=2; $v=new.0
311: iteration 3: $k=3; $v=new.1
312: iteration 4: $k=4; $v=new.2
313: iteration 5: $k=5; $v=new.3
314: ** Stuck in a loop! **
315: --> State of array after loop:
316: array(8) {
317: [0]=>
318: string(3) "v.0"
319: [1]=>
320: string(3) "v.1"
321: [2]=>
322: string(5) "new.0"
323: [3]=>
324: string(5) "new.1"
325: [4]=>
326: string(5) "new.2"
327: [5]=>
328: string(5) "new.3"
329: [6]=>
330: string(5) "new.4"
331: [7]=>
332: string(5) "new.5"
333: }
334:
335: ---( Array with 3 element(s): )---
336: --> State of referenced array before loop:
337: array(3) {
338: [0]=>
339: string(3) "v.0"
340: [1]=>
341: string(3) "v.1"
342: [2]=>
343: string(3) "v.2"
344: }
345: --> Do loop:
346: iteration 0: $k=0; $v=v.0
347: iteration 1: $k=1; $v=v.1
348: iteration 2: $k=2; $v=v.2
349: iteration 3: $k=3; $v=new.0
350: iteration 4: $k=4; $v=new.1
351: iteration 5: $k=5; $v=new.2
352: ** Stuck in a loop! **
353: --> State of array after loop:
354: array(9) {
355: [0]=>
356: string(3) "v.0"
357: [1]=>
358: string(3) "v.1"
359: [2]=>
360: string(3) "v.2"
361: [3]=>
362: string(5) "new.0"
363: [4]=>
364: string(5) "new.1"
365: [5]=>
366: string(5) "new.2"
367: [6]=>
368: string(5) "new.3"
369: [7]=>
370: string(5) "new.4"
371: [8]=>
372: string(5) "new.5"
373: }
374:
375: ---( Array with 4 element(s): )---
376: --> State of referenced array before loop:
377: array(4) {
378: [0]=>
379: string(3) "v.0"
380: [1]=>
381: string(3) "v.1"
382: [2]=>
383: string(3) "v.2"
384: [3]=>
385: string(3) "v.3"
386: }
387: --> Do loop:
388: iteration 0: $k=0; $v=v.0
389: iteration 1: $k=1; $v=v.1
390: iteration 2: $k=2; $v=v.2
391: iteration 3: $k=3; $v=v.3
392: iteration 4: $k=4; $v=new.0
393: iteration 5: $k=5; $v=new.1
394: ** Stuck in a loop! **
395: --> State of array after loop:
396: array(10) {
397: [0]=>
398: string(3) "v.0"
399: [1]=>
400: string(3) "v.1"
401: [2]=>
402: string(3) "v.2"
403: [3]=>
404: string(3) "v.3"
405: [4]=>
406: string(5) "new.0"
407: [5]=>
408: string(5) "new.1"
409: [6]=>
410: string(5) "new.2"
411: [7]=>
412: string(5) "new.3"
413: [8]=>
414: string(5) "new.4"
415: [9]=>
416: string(5) "new.5"
417: }
418:
419:
420:
421: Adding elements to the start of a referenced array
422: ---( Array with 1 element(s): )---
423: --> State of referenced array before loop:
424: array(1) {
425: [0]=>
426: string(3) "v.0"
427: }
428: --> Do loop:
429: iteration 0: $k=0; $v=v.0
430: --> State of array after loop:
431: array(2) {
432: [0]=>
433: string(5) "new.0"
434: [1]=>
435: string(3) "v.0"
436: }
437:
438: ---( Array with 2 element(s): )---
439: --> State of referenced array before loop:
440: array(2) {
441: [0]=>
442: string(3) "v.0"
443: [1]=>
444: string(3) "v.1"
445: }
446: --> Do loop:
447: iteration 0: $k=0; $v=v.0
448: iteration 1: $k=0; $v=new.0
449: iteration 2: $k=0; $v=new.1
450: iteration 3: $k=0; $v=new.2
451: iteration 4: $k=0; $v=new.3
452: iteration 5: $k=0; $v=new.4
453: ** Stuck in a loop! **
454: --> State of array after loop:
455: array(8) {
456: [0]=>
457: string(5) "new.5"
458: [1]=>
459: string(5) "new.4"
460: [2]=>
461: string(5) "new.3"
462: [3]=>
463: string(5) "new.2"
464: [4]=>
465: string(5) "new.1"
466: [5]=>
467: string(5) "new.0"
468: [6]=>
469: string(3) "v.0"
470: [7]=>
471: string(3) "v.1"
472: }
473:
474: ---( Array with 3 element(s): )---
475: --> State of referenced array before loop:
476: array(3) {
477: [0]=>
478: string(3) "v.0"
479: [1]=>
480: string(3) "v.1"
481: [2]=>
482: string(3) "v.2"
483: }
484: --> Do loop:
485: iteration 0: $k=0; $v=v.0
486: iteration 1: $k=0; $v=new.0
487: iteration 2: $k=0; $v=new.1
488: iteration 3: $k=0; $v=new.2
489: iteration 4: $k=0; $v=new.3
490: iteration 5: $k=0; $v=new.4
491: ** Stuck in a loop! **
492: --> State of array after loop:
493: array(9) {
494: [0]=>
495: string(5) "new.5"
496: [1]=>
497: string(5) "new.4"
498: [2]=>
499: string(5) "new.3"
500: [3]=>
501: string(5) "new.2"
502: [4]=>
503: string(5) "new.1"
504: [5]=>
505: string(5) "new.0"
506: [6]=>
507: string(3) "v.0"
508: [7]=>
509: string(3) "v.1"
510: [8]=>
511: string(3) "v.2"
512: }
513:
514: ---( Array with 4 element(s): )---
515: --> State of referenced array before loop:
516: array(4) {
517: [0]=>
518: string(3) "v.0"
519: [1]=>
520: string(3) "v.1"
521: [2]=>
522: string(3) "v.2"
523: [3]=>
524: string(3) "v.3"
525: }
526: --> Do loop:
527: iteration 0: $k=0; $v=v.0
528: iteration 1: $k=0; $v=new.0
529: iteration 2: $k=0; $v=new.1
530: iteration 3: $k=0; $v=new.2
531: iteration 4: $k=0; $v=new.3
532: iteration 5: $k=0; $v=new.4
533: ** Stuck in a loop! **
534: --> State of array after loop:
535: array(10) {
536: [0]=>
537: string(5) "new.5"
538: [1]=>
539: string(5) "new.4"
540: [2]=>
541: string(5) "new.3"
542: [3]=>
543: string(5) "new.2"
544: [4]=>
545: string(5) "new.1"
546: [5]=>
547: string(5) "new.0"
548: [6]=>
549: string(3) "v.0"
550: [7]=>
551: string(3) "v.1"
552: [8]=>
553: string(3) "v.2"
554: [9]=>
555: string(3) "v.3"
556: }